Peptidase substrate index

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Num

Click on the Uniprot accession to show all cleavages stored in the MEROPS database for this substrate.

Substrate name	UniProt ID	MEROPS ID	Peptidase name	Total cleavages
I-1140 (Z-Gly-Gly-Arg-NHMec)		S01.132	mannan-binding lectin-associated serine peptidase-3	1
I-1295 (Pro-Phe-Arg-NHMec)		S01.132	mannan-binding lectin-associated serine peptidase-3	1
I-superfamily conotoxin BtX	Q9U3Z3	XS26.001	signal peptidase complex (animal)	1
I-superfamily conotoxin ViTx	Q7YZS9	XS26.001	signal peptidase complex (animal)	1
IAA-Arg-Arg-NHPhNO2		A26.001	omptin	1
IAH1 protein	Q6NVV8	S01.151	trypsin 1	2
IAPP	Q0ZD87	S08.072	PCSK1 peptidase	1
		S08.073	PCSK2 peptidase	1
ice-structuring protein A	P04002	XS26.001	signal peptidase complex (animal)	1
ice-structuring protein B	Q99013	XS26.001	signal peptidase complex (animal)	1
ice-structuring protein SP1-C	P07457	XS26.001	signal peptidase complex (animal)	1
IclR family transcriptional repressor	Q8ZL84	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
ICOS ligand	O75144	S01.081	kallikrein-related peptidase 15	1
icsA protein precursor	Q7BCK4	A26.005	IcsP peptidase (Shigella flexneri)	1
IFNG interferon, gamma	P01579	A26.001	omptin	2
Ig alpha-1 chain C region	P01876	S06.007	IgA1-specific serine peptidase type 1 (Haemophilus sp.)	2
ig gamma-1 chain C region	P01857	C13.004	legumain, animal-type	4
Ig gamma-3 chain C region	P01860	C01.033	cathepsin L1 (Fasciola sp.)	1
		C66.001	IdeS peptidase	1
		M10.005	matrix metallopeptidase-3	1
		M10.008	matrix metallopeptidase-7	1
Ig gamma-4 chain C region	P01861	C01.033	cathepsin L1 (Fasciola sp.)	1
		M10.005	matrix metallopeptidase-3	1
		M10.008	matrix metallopeptidase-7	1
Ig heavy chain V region M167	P01795	XS26.001	signal peptidase complex (animal)	1
Ig heavy chain V region MOPC 315	P01822	XS26.001	signal peptidase complex (animal)	1
Ig heavy chain V-I region ND	P01744	XS26.001	signal peptidase complex (animal)	1
Ig heavy chain V-I region V35 precursor	P23083	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V region EV15 precursor	P06315	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-I region Daudi precursor	P04432	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-I region Walker precursor	P04431	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-III region CLL precursor	P04207	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-III region HAH precursor	P18135	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-III region IARC/BL41 precursor	P06311	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-III region MOPC 321	P01658	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-III region MOPC 63	P01661	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-III region NG9 (Precursor; Fragment)	P01621	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-IV region (Precursor; Fragment)	P06312	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-V region MOPC 21	P01634	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-V region MOPC 41	P01639	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V-V region MPC11	P01633	XS26.001	signal peptidase complex (animal)	1
Ig kappa chain V19-17-like	A0A6P5P2N7	M10.009	matrix metallopeptidase-12	1
Ig lambda chain V-I region BL2 precursor	P06316	XS26.001	signal peptidase complex (animal)	1
Ig lambda-1 chain V regions MOPC 104E/RPC20/J558/S104	P01724	XS26.001	signal peptidase complex (animal)	1
ig lambda-2 chain C regions	P0CG05	M12.140	bothropasin	4
Ig lambda-2 chain V region MOPC 315	P01729	XS26.001	signal peptidase complex (animal)	1
ig mu heavy chain disease protein	P04220	M12.140	bothropasin	2
IgA protease precursor	Q9AES2	C60.001	sortase A (Staphylococcus-type)	1
		S26.001	signal peptidase I	1
IgA1 protease	P44969	S60.001	lactoferrin	2
IGF-1a	P01343	S08.071	furin	1
IgG gamma 2 H chain	P01859	C01.033	cathepsin L1 (Fasciola sp.)	1
igG heavy chain	L8B0S2	C113.001	IgdE peptidase (Streptococcus suis)	1
	L8B0S7	C113.001	IgdE peptidase (Streptococcus suis)	1
	L8B0V2	C113.001	IgdE peptidase (Streptococcus suis)	1
	L8B0V6	C113.001	IgdE peptidase (Streptococcus suis)	1
	L8B0W9	C113.001	IgdE peptidase (Streptococcus suis)	1
	L8B0Y6	C113.001	IgdE peptidase (Streptococcus suis)	1
	L8B139	C113.001	IgdE peptidase (Streptococcus suis)	1
	L8B180	C113.001	IgdE peptidase (Streptococcus suis)	1
IgG receptor FcRn large subunit p51	P55899	XS26.001	signal peptidase complex (animal)	1
IgG1 heavy chain (hinge region)	P01857	A01.001	pepsin A	1
		A01.070	pepsin A4	1
		C01.001	papain	2
		C01.033	cathepsin L1 (Fasciola sp.)	1
		C66.001	IdeS peptidase	1
		M10.005	matrix metallopeptidase-3	1
		M10.008	matrix metallopeptidase-7	1
		M10.009	matrix metallopeptidase-12	1
		S01.131	elastase-2	1
		S01.133	cathepsin G	1
		S01.233	plasmin	1
		S01.269	glutamyl endopeptidase I	1
IgGFc-binding protein	Q9Y6R7	S01.081	kallikrein-related peptidase 15	1
Igl-ACC		M01.005	alanyl aminopeptidase (bacterial-type)	1
IKBKAP variant protein	Q4LE38	S01.151	trypsin 1	2
IL-1Rc		M12.208	ADAM8 peptidase	1
Il1b	Q2M4J6	C14.001	caspase-1	1
IL1F7	Q9NZH6	C14.001	caspase-1	1
IL6R	P08887	M12.217	ADAM17 peptidase	1
Ile-Ala-Arg-Arg-His-Pro-Tyr-Phe-Leu		S09.013	dipeptidyl-peptidase 4 (bacteria-type 2)	1
		S46.001	dipeptidyl-peptidase 7 (Porphyromonas gingivalis-type)	2
Ile-Arg-Lys-Ile-Leu-Phe-Leu-Asp-Gly		A02.012	retropepsin (human T-cell leukemia virus)	1
Ile-Asp-MCA		S46.002	dipeptidyl-peptidase 11 (Porphyromonas gingivalis-type)	1
Ile-Asp-NHMec		S46.002	dipeptidyl-peptidase 11 (Porphyromonas gingivalis-type)	1
Ile-Gln-Asn-Pro-Ile-Gly-Glu-Ser-Val-Gln-Pro-Arg-Met-Ala-Met-biotin		S01.135	granzyme A	1
		S01.146	granzyme K	1
Ile-Glu		C9B.001	lysosomal dipeptidase II	1
Ile-Glu-Arg-NHPhNO2		S01.151	trypsin 1	1
Ile-Glu-Thr-Asp-AFC		C14.022	caspase DECAY	1
Ile-Glu-Thr-Asp-NHMec		C14.019	caspase DRONC (Drosophila melanogaster)	1
		C14.025	caspase DAMM (Drosophila sp.)	1
Ile-Glu-Thr-Asp-NHPhNO2		C14.038	caspase-15	1
		C14.040	caspase Dredd	1
Ile-NH2		M01.013	aminopeptidase N (insect)	1
Ile-NHMec		M01.022	arginyl aminopeptidase-like 1	1
		M28.022	leucine aminopeptidase-1 (Aspergillus fumigatus)	1
Ile-NHNap		M01.010	cytosol alanyl aminopeptidase	1
		M9A.011	neuron-specific aminopeptidase	1
Ile-NHPhNO2		M28.006	Mername-AA063 peptidase	1
		M42.004	PhTET2 aminopeptidase	1
		M42.010	CelM peptidase	1
Ile-Phe		M9A.007	Xaa-Trp aminopeptidase	1
Ile-Phe-Asp-His-Asn-Ser-Ile-Ser-Asp-Ile-Thr-Pro-Tyr-Pro-Arg-biotin		S01.135	granzyme A	1
Ile-Phe-Gln-Ala-NH2		M61.001	glycyl aminopeptidase	1
Ile-Pro		M24.003	Xaa-Pro dipeptidase (bacteria-type)	1
		M38.002	Pro-Hyp dipeptidase	1
Ile-Pro-ACC		M24.038	aminopeptidase P (Plasmodium falciparum-type)	1
Ile-Pro-Arg-NHPhNO2		S01.151	trypsin 1	1
		S01.239	plasminogen activator (Desmodus-type)	1
		S01.294	HAT-like 3 peptidase	1
Ile-Ser-bradykinin		M02.002	peptidyl-dipeptidase Acer	1
		M02.003	peptidyl-dipeptidase Ance	1
Ile-Thr-Ile-Gly-Asn-Lys-Asn-Asp		M42.005	TET aminopeptidase	1
Ile-Trp		M9A.007	Xaa-Trp aminopeptidase	1
Ile-Tyr		M9A.007	Xaa-Trp aminopeptidase	1
Immediate early response 3-interacting protein 1	Q9Y5U9	S01.151	trypsin 1	1
immediate-early protein 1	P11210	T01.010	proteasome subunit beta1c	4
		T01.011	proteasome subunit beta2c	3
		T01.012	proteasome subunit beta5c	8
		XT01.001	20S constitutive proteasome peptidase complex (eukaryote)	7
		XT01.003	20 S immunoproteasome peptidase complex (eukaryote)	4
Immortalization up-regulated protein	Q9GZP8	M12.002	meprin alpha subunit	1
		M12.004	meprin beta subunit	1
Immune deficiency	Q7K4Z4	C14.040	caspase Dredd	1
immune-induced peptide 14	P83869	XS26.001	signal peptidase complex (animal)	1
Immunity-related GTPase family Q protein	Q8WZA9	S01.072	matriptase-3	1
immunodominant staphylococcal antigen B	Q9LAB5	S26.016	SpsB signal peptidase	1
immunogenic protein MPB64	P0A5Q5	S26.001	signal peptidase I	1
immunogenic protein MPT63	P0A5Q2	S26.001	signal peptidase I	1
immunogenic protein MPT64	P0A5Q4	S26.001	signal peptidase I	1
immunoglobulin G-binding protein A	P38507	C60.001	sortase A (Staphylococcus-type)	1
immunoglobulin IgA1		S06.001	IgA1-specific serine peptidase (Neisseria-type)	1
		S06.007	IgA1-specific serine peptidase type 1 (Haemophilus sp.)	1
	P01876	M26.001	IgA1-specific metallopeptidase	1
		M64.001	IgA peptidase (Clostridium ramosum-type)	1
		S06.008	IgA1-specific serine peptidase type 2 (Haemophilus sp.)	1
immunoglobulin IgA2:A2m(1)	P01877	M64.001	IgA peptidase (Clostridium ramosum-type)	1
Immunoglobulin superfamily member 8	Q969P0	S01.081	kallikrein-related peptidase 15	1
Immunoglobulin-binding protein 1	P78318	C01.032	cathepsin L	1
	Q61249	M10.003	matrix metallopeptidase-2	1
Immunoglobulin-binding protein 1b	Q9QZ29	M10.003	matrix metallopeptidase-2	1
IMP dehydrogenase 2	Q6QE17	S01.151	trypsin 1	8
impA protein	Q7M1C0	S24.UPW	family S24 unassigned peptidases	1
import inner membrane translocase subunit TIM44, mitochondrial precursor	O43615	S01.269	glutamyl endopeptidase I	1
Importin subunit alpha-1	P52292	C01.032	cathepsin L	1
		C01.034	cathepsin S	4
		C13.004	legumain, animal-type	3
		C14.005	caspase-6	1
		M04.001	thermolysin	1
		M10.005	matrix metallopeptidase-3	1
		S01.151	trypsin 1	7
		S01.269	glutamyl endopeptidase I	3
importin subunit alpha-1	P52294	A02.001	HIV-1 retropepsin	1
Importin subunit alpha-1		C01.034	cathepsin S	1
		S01.010	granzyme B (Homo sapiens-type)	1
importin subunit alpha-1		S01.151	trypsin 1	1
importin subunit alpha-2	P52292	A02.001	HIV-1 retropepsin	1
Importin subunit alpha-2		C01.032	cathepsin L	1
importin subunit alpha-2		S01.135	granzyme A	1
		S01.151	trypsin 1	1
Importin subunit alpha-2-like protein	J3QLL0	S01.135	granzyme A	1
Importin subunit alpha-3	O00505	S01.010	granzyme B (Homo sapiens-type)	1
	O00629	C01.018	cathepsin F	1
		C01.036	cathepsin K	1
		S01.081	kallikrein-related peptidase 15	1
Importin subunit alpha-4	O00505	C01.036	cathepsin K	1
		S01.151	trypsin 1	2
importin subunit alpha-4	O00629	A02.001	HIV-1 retropepsin	1
Importin subunit alpha-4		C01.032	cathepsin L	2
		C01.034	cathepsin S	1
		S01.010	granzyme B (Homo sapiens-type)	1
importin subunit alpha-4		S01.151	trypsin 1	4
Importin subunit alpha-4	O35343	A01.010	cathepsin E	1
importin subunit alpha-4		S01.010	granzyme B (Homo sapiens-type)	1
		S01.136	granzyme B, rodent-type	1
		S01.151	trypsin 1	1
Importin subunit alpha-5	P52294	S01.021	DESC1 peptidase	1
		S01.151	trypsin 1	2
importin subunit alpha-6	O15131	A02.001	HIV-1 retropepsin	1
		S01.151	trypsin 1	1
importin subunit alpha-7	O60684	A02.001	HIV-1 retropepsin	1
Importin subunit alpha-7		C01.032	cathepsin L	1
		C01.034	cathepsin S	2
		C14.005	caspase-6	1
		S01.010	granzyme B (Homo sapiens-type)	2
importin subunit alpha-7		S01.151	trypsin 1	2
Importin subunit beta-1	P70168	M10.003	matrix metallopeptidase-2	3
importin subunit beta-1	Q14974	A02.001	HIV-1 retropepsin	5
Importin subunit beta-1		A32.002	RC1339 g.p. (Rickettsia conorii)	6
		C01.009	cathepsin V	7
		C01.018	cathepsin F	1
		C01.032	cathepsin L	12
		C01.034	cathepsin S	4
		C01.036	cathepsin K	1
		C01.060	cathepsin B	1
		C13.004	legumain, animal-type	3
		M04.001	thermolysin	5
importin subunit beta-1		M10.003	matrix metallopeptidase-2	8
Importin subunit beta-1		M10.005	matrix metallopeptidase-3	3
		M12.001	astacin	1
		M12.004	meprin beta subunit	1
		M12.033	LAST_MAM peptidase (Limulus-type)	1
		M35.004	peptidyl-Lys metallopeptidase	3
importin subunit beta-1		S01.001	chymotrypsin A (cattle-type)	1
Importin subunit beta-1		S01.010	granzyme B (Homo sapiens-type)	2
		S01.047	human airway trypsin-like peptidase	1
		S01.081	kallikrein-related peptidase 15	2
importin subunit beta-1		S01.151	trypsin 1	32
Importin subunit beta-1		S01.224	hepsin	1
importin subunit beta-1		S01.269	glutamyl endopeptidase I	11
importin subunit beta-3	O00410	A02.001	HIV-1 retropepsin	1
		M10.003	matrix metallopeptidase-2	5
		S01.001	chymotrypsin A (cattle-type)	1
		S01.151	trypsin 1	24
		S01.269	glutamyl endopeptidase I	3
Importin-11	Q9UI26	C01.032	cathepsin L	1
Importin-4	Q8TEX9	C01.034	cathepsin S	1
importin-4		S01.151	trypsin 1	6
Importin-4 ECO:0000303\|PubMed:11823430		C01.009	cathepsin V	4
		C01.032	cathepsin L	2
		C01.036	cathepsin K	1
Importin-5	O00410	C01.009	cathepsin V	3
		C01.032	cathepsin L	1
		C01.034	cathepsin S	1
		C01.036	cathepsin K	3
		M04.001	thermolysin	1
		S01.151	trypsin 1	12
		S01.269	glutamyl endopeptidase I	2
	Q8BKC5	M10.003	matrix metallopeptidase-2	1
Importin-7	O95373	A32.002	RC1339 g.p. (Rickettsia conorii)	2
		C01.032	cathepsin L	2
		C01.034	cathepsin S	1
		C01.060	cathepsin B	1
		C13.004	legumain, animal-type	1
		M09.002	collagenase G/A (Clostridium histolyticum)	1
		M10.005	matrix metallopeptidase-3	1
		M35.004	peptidyl-Lys metallopeptidase	2
		S01.139	granzyme M	2
importin-7		S01.151	trypsin 1	19
Importin-7	Q9EPL8	A01.010	cathepsin E	1
		M10.003	matrix metallopeptidase-2	2
Importin-9	Q96P70	M09.005	collagenase ColT (Clostridium tetani)	1
importin-9		S01.151	trypsin 1	10
Importin-9	Q9ULM8	C14.005	caspase-6	1
		S01.081	kallikrein-related peptidase 15	1
Importin-9 ECO:0000303\|PubMed:30855230	Q96P70	C01.036	cathepsin K	2
IMV membrane protein precursor	P68592	C57.001	vaccinia virus I7L processing peptidase	1
Inactive C-alpha-formylglycine-generating enzyme 2 ECO:0000305	Q8NBJ7	C01.018	cathepsin F	2
		C01.036	cathepsin K	2
Inactive L-threonine 3-dehydrogenase, mitochondrial	Q8IZJ6	M12.033	LAST_MAM peptidase (Limulus-type)	1
Inactive N-acetyllactosaminide alpha-1,3-galactosyltransferase	Q4G0N0	S01.280	lysyl endopeptidase (bacteria)	2
Inactive recombination-promoting nuclease-like protein RpnE	P37014	S41.011	chlamydial protease-like activity factor	1
Inactive serine protease 54 precursor	Q6PEW0	M35.004	peptidyl-Lys metallopeptidase	2
Inactive tyrosine-protein kinase 7	Q13308	S01.151	trypsin 1	2
		S01.269	glutamyl endopeptidase I	1
	Q8NFA6	S01.081	kallikrein-related peptidase 15	2
Inactive ubiquitin carboxyl-terminal hydrolase 54	Q6ZTM0	C14.005	caspase-6	1
indian hedgehog protein	Q14623	C46.003	Indian hedgehog protein	1
indian hedgehog protein precursor	P97812	C46.003	Indian hedgehog protein	1
indole-3-acetyl-Asp		M20.020	p-aminobenzoyl-glutamate hydrolase subunit A	1
induced myeloid leukemia cell differentiation protein Mcl-1	Q07820	C14.003	caspase-3	3
		S01.010	granzyme B (Homo sapiens-type)	3
Induced myeloid leukemia cell differentiation protein Mcl-1	Q9UHR8	C14.005	caspase-6	1
inducible T-cell costimulator	Q9R1T7	XS26.001	signal peptidase complex (animal)	1
Influenza virus NS1A-binding protein	Q9Y6Y0	S01.280	lysyl endopeptidase (bacteria)	2
inhibin alpha chain	P07994	XS26.001	signal peptidase complex (animal)	1
Inhibin alpha chain precursor	P05111	S01.251	kallikrein-related peptidase 4	1
Inhibin beta A chain	P08476	S01.081	kallikrein-related peptidase 15	1
Inhibin beta A chain precursor		S01.251	kallikrein-related peptidase 4	1
Inhibin beta B chain	P09529	S01.081	kallikrein-related peptidase 15	1
Inhibin beta C chain precursor	P55103	S01.251	kallikrein-related peptidase 4	1
Inhibitor of Bruton tyrosine kinase	Q9HBI8	C01.009	cathepsin V	1
	Q9P2D0	M35.004	peptidyl-Lys metallopeptidase	2
Inhibitor of growth protein 1	Q9UK52	C01.009	cathepsin V	1
		C01.018	cathepsin F	1
		C01.032	cathepsin L	1
		C01.036	cathepsin K	1
Inhibitor of growth protein 2	Q9H160	C01.009	cathepsin V	1
		C01.018	cathepsin F	1
		C01.032	cathepsin L	1
		C01.036	cathepsin K	1
inhibitor of nuclear factor kappa-B kinase subunit beta	O14920	M10.003	matrix metallopeptidase-2	1
		S01.151	trypsin 1	1
Inhibitor of nuclear factor kappa-B kinase subunit beta	O88351	A01.010	cathepsin E	1
Inhibitor of nuclear factor kappa-B kinase-interacting protein	Q70UQ0	S01.151	trypsin 1	5
Inhibitor of vertebrate lysozyme	P0AD59	S01.151	trypsin 1	2
inhibitor of vertebrate lysozyme		S26.001	signal peptidase I	1
initiation factor eIF-4G	Q6NZJ6	A01.010	cathepsin E	1
		C28.001	foot-and-mouth disease virus L-peptidase	2
		S01.010	granzyme B (Homo sapiens-type)	1
		S01.136	granzyme B, rodent-type	1
		S01.151	trypsin 1	1
Inner centromere protein	Q9WU62	A01.009	cathepsin D	1
Inner membrane metabolite transport protein YdjE	P38055	S01.151	trypsin 1	1
Inner membrane protein YdcO	P76103	M12.025	ADAMTS15 peptidase	1
Inner membrane protein YfdC	P37327	S01.151	trypsin 1	1
Inner membrane protein YhaI	P64592	S01.151	trypsin 1	1
Inner membrane protein YjgN	P39338	S41.011	chlamydial protease-like activity factor	1
Inner membrane protein YqjF	P42619	S41.011	chlamydial protease-like activity factor	1
Inner nuclear membrane protein Man1	Q9Y2U8	M09.003	bacterial collagenase H	1
		S01.139	granzyme M	1
INO80 complex subunit D	Q53TQ3	C14.005	caspase-6	1
Inorganic pyrophosphatase	P0A7A9	M12.221	ADAMTS4 peptidase	1
		M12.225	ADAMTS5 peptidase	1
inorganic pyrophosphatase		M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
Inorganic pyrophosphatase		S01.151	trypsin 1	2
		S41.011	chlamydial protease-like activity factor	1
	P65748	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
	Q15181	C01.009	cathepsin V	7
		C01.018	cathepsin F	8
		C01.032	cathepsin L	6
		C01.034	cathepsin S	8
inorganic pyrophosphatase		C01.036	cathepsin K	16
Inorganic pyrophosphatase		C01.060	cathepsin B	6
		C13.004	legumain, animal-type	1
		C14.004	caspase-7	2
inorganic pyrophosphatase		C14.005	caspase-6	4
Inorganic pyrophosphatase		M04.001	thermolysin	3
inorganic pyrophosphatase		M10.003	matrix metallopeptidase-2	7
Inorganic pyrophosphatase		M10.005	matrix metallopeptidase-3	2
		M12.001	astacin	1
		M12.002	meprin alpha subunit	3
		M12.004	meprin beta subunit	4
inorganic pyrophosphatase		M35.004	peptidyl-Lys metallopeptidase	6
Inorganic pyrophosphatase		S01.081	kallikrein-related peptidase 15	1
inorganic pyrophosphatase		S01.151	trypsin 1	28
		S01.269	glutamyl endopeptidase I	4
Inorganic pyrophosphatase	Q9D819	A01.010	cathepsin E	1
	Q9YBA5	M04.001	thermolysin	3
Inorganic pyrophosphatase 2, mitochondrial	Q9H2U2	C01.034	cathepsin S	1
		M10.005	matrix metallopeptidase-3	2
		M12.004	meprin beta subunit	1
		S01.151	trypsin 1	3
inorganic pyrophosphatase 2, mitochondrial precursor		S01.151	trypsin 1	2
Inorganic pyrophosphatase 2, mitochondrial ECO:0000305\|PubMed:27523597	Q9NX37	C01.036	cathepsin K	1
inosamine-phosphate amidinotransferase 1	P08078	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
inosine monophosphate dehydrogenase type II	Q6RUP8	S01.151	trypsin 1	2
inosine triphosphate pyrophosphatase	Q9BY32	M10.003	matrix metallopeptidase-2	3
		S01.151	trypsin 1	4
		S01.269	glutamyl endopeptidase I	2
Inosine triphosphate pyrophosphatase isoform 2	Q9BY32-2	M10.003	matrix metallopeptidase-2	2
		S01.151	trypsin 1	1
		S01.269	glutamyl endopeptidase I	1
Inosine triphosphate pyrophosphatase ECO:0000255\|HAMAP-Rule:MF_03148, ECO:0000303\|PubMed:11278832	Q9BY32	C01.009	cathepsin V	1
		C01.036	cathepsin K	2
Inosine-5'-monophosphate dehydrogenase 1	P20839	C01.032	cathepsin L	1
Inosine-5'-monophosphate dehydrogenase 2	P12268	C01.032	cathepsin L	5
		C01.034	cathepsin S	3
		C01.060	cathepsin B	6
		M12.004	meprin beta subunit	2
	P24547	M10.003	matrix metallopeptidase-2	1
inositol 1,4,5-trisphosphate receptor type 1	P11881	C14.003	caspase-3	1
Inositol 1,4,5-trisphosphate receptor type 1	Q14643	S01.280	lysyl endopeptidase (bacteria)	2
inositol 1,4,5-trisphosphate receptor type 3	Q14573	C01.036	cathepsin K	1
Inositol 1,4,5-trisphosphate receptor type 3		M35.004	peptidyl-Lys metallopeptidase	2
inositol 1,4,5-trisphosphate receptor type 3		S01.151	trypsin 1	9
Inositol hexakisphosphate and diphosphoinositol-pentakisphosphate kinase 2	O43314	S01.010	granzyme B (Homo sapiens-type)	1
Inositol monophosphatase 1	P29218	M04.001	thermolysin	1
		S01.081	kallikrein-related peptidase 15	1
		S01.151	trypsin 1	7
		S01.269	glutamyl endopeptidase I	1
Inositol monophosphatase 2	O14732	C01.018	cathepsin F	1
		C01.036	cathepsin K	1
	Q91UZ5	M10.003	matrix metallopeptidase-2	1
Inositol polyphosphate 1-phosphatase	P49441	S01.280	lysyl endopeptidase (bacteria)	2
Inositol polyphosphate 5-phosphatase OCRL-1	Q01968	S01.010	granzyme B (Homo sapiens-type)	1
inositol-3-phosphate synthase	Q9NPH2	S01.151	trypsin 1	4
Inositol-3-phosphate synthase	Q9YBT2	M04.001	thermolysin	5
Inositol-trisphosphate 3-kinase A	P23677	M12.033	LAST_MAM peptidase (Limulus-type)	1
Inositol-trisphosphate 3-kinase B	P27987	C14.005	caspase-6	1
insl6 insulin-like 6	Q9QY05	S08.071	furin	1
insulin	P01308	C02.001	calpain-1	4
		M10.004	matrix metallopeptidase-9	10
		M12.002	meprin alpha subunit	10
		M14.005	carboxypeptidase E	3
		M16.002	insulysin	8
		S08.149	CDF peptidase	3
		U9G.007	dibasic processing endopeptidase (unsequenced)	2
		XS26.001	signal peptidase complex (animal)	1
Insulin	P01317	A01.030	yapsin-1	3
insulin		C01.092	cathepsin L1 (arthropod-type)	1
		M16.002	insulysin	7
		XT01.001	20S constitutive proteasome peptidase complex (eukaryote)	5
insulin A chain	P01311	XS26.001	signal peptidase complex (animal)	1
	P01313	XS26.001	signal peptidase complex (animal)	1
	P01315	XS26.001	signal peptidase complex (animal)	1
	P01318	XS26.001	signal peptidase complex (animal)	1
	P01321	XS26.001	signal peptidase complex (animal)	1
	P01329	XS26.001	signal peptidase complex (animal)	1
	P01335	XS26.001	signal peptidase complex (animal)	1
	P01342	XS26.001	signal peptidase complex (animal)	1
	P04667	XS26.001	signal peptidase complex (animal)	1
	P06306	XS26.001	signal peptidase complex (animal)	1
	P17715	XS26.001	signal peptidase complex (animal)	1
	P67970	XS26.001	signal peptidase complex (animal)	1
	P81025	XS26.001	signal peptidase complex (animal)	1
Insulin A chain (oxidised)	P01317	M03.007	oligopeptidase F	5
Insulin A chain (oxidized)		S01.153	elastase-1	1
insulin A chain (oxidized)		A01.016	aspergillopepsin I	1
		C01.075	cruzipain	4
		M04.001	thermolysin	2
		M10.063	PrtA peptidase (Photorhabdus-type)	3
		M12.145	atrolysin E	1
		M12.149	horrilysin	1
		M12.178	brevilysin L6	4
		M12.303	acutolysin C	2
		M73.001	camelysin	4
		M9G.003	acrolysin	1
Insulin A chain (oxidized)		S01.001	chymotrypsin A (cattle-type)	3
insulin A chain (oxidized)		S01.153	elastase-1	8
		S01.157	chymotrypsin C	8
		S01.443	glutamyl peptidase BI	3
		S08.003	subtilisin lentus	6
		S08.057	thermomycolin	2
Insulin B (oxidised)	P01308	M54.001	archaelysin	2
Insulin B chain	P01317	C13.004	legumain, animal-type	1
Insulin B chain (oxidised)		A01.013	mucorpepsin	4
Insulin B chain (Oxidised)		A01.037	canditropsin	1
Insulin B chain (oxidised)		A01.040	nepenthesin	5
		A01.071	pepsin A5 (Homo sapiens)	7
Insulin B chain (Oxidised)		C01.096	melain G	5
		C01.097	phytolacain	12
		M9G.034	metallopeptidase ShpII (Staphylococcus hyicus)	8
		M9G.047	insulin-cleaving periplasmic peptidase (Acinetobacter calcoaceticus)	7
		S9G.064	archealysin	3
Insulin B chain (oxidised)		S9G.093	MSP 1 endopeptidase (Bothrops moojeni)	2
		S9G.094	MSP 2 endopeptidase (Bothrops moojeni)	2
insulin B chain (oxidized)	P01308	A01.010	cathepsin E	9
		M12.190	ammodytase	2
Insulin B chain (oxidized)		M12.216	jerdohagin (Trimeresurus jerdonii)	15
		M12.UPB	subfamily M12B unassigned peptidases	3
		S01.142	duodenase	1
insulin B chain (oxidized)		S08.014	ALE1 peptidase	3
	P01317	A37.001	sso1175 g.p. (Sulfolobus solfataricus)	1
Insulin B chain (oxidized)		S10.006	Mername-AA083 peptidase	1
		S10.014	carboxypeptidase O	4
insulin B chain (oxidized)		XM02.001	angiotensin-converting enzyme compound peptidase	1
		XM12.001	meprin A complex peptidase	10
insulin B chain (oxidized) (10-30)		M28.002	aminopeptidase Ap1	1
insulin B chain (oxidized) (11-30)		M28.002	aminopeptidase Ap1	1
insulin B chain (oxidized) (2-30)		M28.002	aminopeptidase Ap1	1
insulin B chain (oxidized) (21-26)		C01.050	histolysain	1
insulin B chain (oxidized) (3-30)		M28.002	aminopeptidase Ap1	1
insulin B chain (oxidized) (4-30)		M28.002	aminopeptidase Ap1	1
insulin B chain (oxidized) (5-30)		M28.002	aminopeptidase Ap1	1
insulin B chain (oxidized) (6-30)		M28.002	aminopeptidase Ap1	1
insulin B chain (oxidized) (7-30)		M28.002	aminopeptidase Ap1	1
insulin B chain (oxidized) (8-30)		M28.002	aminopeptidase Ap1	1
insulin B chain (oxidized) (9-30)		M28.002	aminopeptidase Ap1	1
insulin B-chain (oxidized)	P01308	M10.A05	At3-MMP (Arabidopsis thaliana)	1
		M12.155	trimerelysin II	5
		M12.UPB	subfamily M12B unassigned peptidases	1
	P01317	A01.001	pepsin A	9
		A01.002	pepsin B	6
		A01.003	gastricsin	8
		A01.004	BACE1 g.p. (Homo sapiens)	1
		A01.009	cathepsin D	3
		A01.010	cathepsin E	10
		A01.011	penicillopepsin	1
		A01.012	rhizopuspepsin	13
		A01.014	candidapepsin SAP1	5
		A01.016	aspergillopepsin I	5
		A01.017	endothiapepsin	5
		A01.018	saccharopepsin	4
		A01.019	polyporopepsin	4
		A01.020	phytepsin	6
		A01.036	axp peptidase (Yarrowia lipolytica)	1
		A01.037	canditropsin	4
		A01.040	nepenthesin	5
		A01.041	BACE2 g.p. (Homo sapiens)	5
		A01.060	candidapepsin SAP2	1
		A01.061	candidapepsin SAP3	1
		A01.064	candidapepsin SAP6	1
		A01.069	CDR1 peptidase (Arabidopsis-type)	1
		A01.095	shewasin A (Shewanella amazonensis)	2
		A01.096	chlapsin	1
		A02.001	HIV-1 retropepsin	1
		A02.002	HIV-2 retropepsin	1
		A02.061	Ulysses retrotransposon retropepsin	4
		A05.001	thermopsin	15
		A11.001	Copia transposon peptidase	6
		A28.004	skin SASPase	3
		A37.001	sso1175 g.p. (Sulfolobus solfataricus)	5
		A9G.010	pycnoporopepsin	3
		A9G.019	acrocylindropepsin	6
		C01.001	papain	16
		C01.002	chymopapain	7
		C01.003	caricain	7
		C01.005	stem bromelain	12
		C01.006	ficin	5
		C01.007	actinidin	8
		C01.008	asclepain A	10
		C01.032	cathepsin L	5
		C01.034	cathepsin S	6
		C01.060	cathepsin B	9
		C01.075	cruzipain	6
		C01.092	cathepsin L1 (arthropod-type)	10
		C02.001	calpain-1	4
		C10.001	streptopain	10
		C25.001	gingipain RgpA	1
		C47.003	EcpA peptidase	1
		C66.002	dentipain	2
		C9G.001	cathepsin N	11
		G01.001	scytalidoglutamic peptidase	4
		G01.002	aspergilloglutamic peptidase	3
		G01.005	PMAP-1 peptidase (Penicillium marneffei)	3
		M04.001	thermolysin	8
		M04.005	pseudolysin	9
		M04.007	coccolysin	5
		M04.009	aureolysin	6
		M04.010	vimelysin	5
		M05.001	mycolysin	9
		M07.001	snapalysin	3
		M08.001	leishmanolysin	2
		M10.001	matrix metallopeptidase-1	1
		M10.005	matrix metallopeptidase-3	2
		M10.008	matrix metallopeptidase-7	2
		M10.009	matrix metallopeptidase-12	2
		M10.010	envelysin	4
		M10.024	membrane-type matrix metallopeptidase-6	10
		M10.056	aeruginolysin	10
		M10.063	PrtA peptidase (Photorhabdus-type)	3
		M10.A05	At3-MMP (Arabidopsis thaliana)	5
		M12.004	meprin beta subunit	4
		M12.131	acutolysin A	2
		M12.132	jararafibrase	6
		M12.133	fibrolase	1
		M12.134	halylysin a	3
		M12.136	leucolysin	7
		M12.137	BHRa hemorrhagin (Bitis arietans)	8
		M12.138	jararhagin	8
		M12.139	bothrolysin	3
		M12.140	bothropasin	5
		M12.141	adamalysin	6
		M12.142	atrolysin A	5
		M12.143	atrolysin B	5
		M12.144	atrolysin C	5
		M12.145	atrolysin E	7
		M12.146	atrolysin F	6
		M12.147	atroxase	5
		M12.148	basilysin	2
		M12.149	horrilysin	1
		M12.150	ruberlysin	4
		M12.152	ophiolysin	5
		M12.153	fibrinolytic peptidase (Philodryas olfersii)	14
		M12.154	trimerelysin I	2
		M12.155	trimerelysin II	3
		M12.157	mucrolysin	5
		M12.160	venom metallopeptidase PREH	2
		M12.161	kistomin (Calloselasma rhodostoma)	7
		M12.162	mutalysin II	4
		M12.164	lebetase	2
		M12.168	alpha peptidase (Crotalus atrox)	4
		M12.169	metallopeptidase B (Bothrops moojeni)	10
		M12.170	jararafibrase II (Bothrops jararaca)	2
		M12.171	HT-1 peptidase (Crotalus viridis)	5
		M12.175	hemorrhagic toxin I (Crotalus ruber)	5
		M12.178	brevilysin L6	10
		M12.179	bilitoxin 2 (Agkistrodon bilineatus)	4
		M12.182	hemorrhagic metallopeptidase a (Trimeresurus mucrosquamatus)	3
		M12.183	hemorrhagic metallopeptidase b (Trimeresurus mucrosquamatus)	1
		M12.184	mutalysin I	1
		M12.209	ADAM9 peptidase	2
		M12.214	ADAM19 peptidase	1
		M12.217	ADAM17 peptidase	1
		M12.244	ADAM33 peptidase	1
		M12.303	acutolysin C	4
		M12.304	jararafibrase III (Bothrops jararaca)	5
		M12.305	jararafibrase IV (Bothrops jararaca)	2
		M12.306	BHRb haemorrhagin (Bitis arietans)	6
		M12.307	halylysin b	5
		M12.308	halylysin c	3
		M12.309	hemorrhagic toxin I (Gloydius halys blomhoffii)	8
		M12.312	neuwiedase (Bothrops neuwiedi)	2
		M12.315	halysase	6
		M12.327	leucurolysin-a	2
		M12.334	fibrinogenase-2 (Deinagkistrodon acutus)	3
		M12.345	moojeni peptidase A	4
		M12.UPB	subfamily M12B unassigned peptidases	7
		M13.001	neprilysin	10
		M13.002	endothelin-converting enzyme 1	7
		M16.001	pitrilysin	1
		M16.002	insulysin	2
		M16.016	YMXG peptidase	6
		M16.017	plinsulysin	8
		M23.001	beta-lytic metallopeptidase	2
		M28.002	aminopeptidase Ap1	1
		M30.001	hyicolysin	3
		M35.001	penicillolysin	3
		M35.002	deuterolysin	21
		M36.001	fungalysin	5
		M36.002	neutral protease I (Aspergillus oryzae)	8
		M43.007	ulilysin (Methanosarcina acetivorans)	1
		M73.001	camelysin	5
		M75.001	imelysin	4
		M9G.022	peptidase Ci (Escherichia coli)	9
		S01.001	chymotrypsin A (cattle-type)	4
		S01.052	kallidin-releasing enzyme (Bitis arietans)	4
		S01.086	30kP peptidase A (Bombyx-type)	6
		S01.090	hypodermin B	2
		S01.111	hypodermin A	1
		S01.121	hypodermin C	3
		S01.122	brachyurin-C	13
		S01.131	elastase-2	6
		S01.133	cathepsin G	7
		S01.134	myeloblastin	4
		S01.151	trypsin 1	2
		S01.153	elastase-1	10
		S01.155	pancreatic elastase II	3
		S01.157	chymotrypsin C	9
		S01.162	kallikrein-related peptidase 3	2
		S01.172	kallikrein 1-related peptidase c2 (Rattus norvegicus)	3
		S01.181	bilineobin	1
		S01.212	plasma kallikrein	2
		S01.223	acrosin	1
		S01.243	lumbrokinase	5
		S01.276	yeast-lytic peptidase	4
		S01.300	kallikrein-related peptidase 7	4
		S01.407	kallikrein 1-related peptidase c9 (Rattus sp.)	1
		S01.422	fibrinolytic enzyme A (Annelida-type)	8
		S01.423	SprE glutamyl peptidase	2
		S01.433	peptidase A (Bothrops-type)	3
		S01.443	glutamyl peptidase BI	4
		S01.499	alkaline endopeptidase (Nesterenkonia sp.)	6
		S08.001	subtilisin Carlsberg	14
		S08.003	subtilisin lentus	9
		S08.005	endopeptidase Q	5
		S08.007	thermitase	9
		S08.008	Mername-AA053 peptidase	15
		S08.009	subtilisin Ak1	3
		S08.010	M-peptidase	14
		S08.017	bacillopeptidase F	4
		S08.022	bpr peptidase (Dichelobacter nodosus)	11
		S08.023	apr5 peptidase (Dichelobacter nodosus)	6
		S08.028	high alkaline protease (Alkaliphilus transvaalensis)	24
		S08.029	thermicin	5
		S08.034	subtilisin BPN'	8
		S08.040	apr2 peptidase (Dichelobacter nodosus)	7
		S08.046	subtilisin aprM	4
		S08.051	aqualysin 1	10
		S08.052	cerevisin	8
		S08.054	endopeptidase K	16
		S08.056	cuticle-degrading peptidase of parasitic fungus	11
		S08.057	thermomycolin	4
		S08.092	cucumisin	20
		S08.097	peptidase C1	1
		S08.098	subtilisin sendai	6
		S08.110	keratinase K1 (Stenotrophomonas maltophilia)	7
		S08.135	tengconlysin	17
		S08.142	collagenolytic endopeptidase (Geobacillus sp. MO-1)	11
		S08.148	keratinase (Doratomyces microsporus)	19
		S08.151	SlSBT3 g.p. (Solanum lycopersicum)	3
		S10.006	Mername-AA083 peptidase	4
		S14.001	peptidase Clp (type 1)	6
		S14.003	peptidase Clp (type 3)	5
		S53.001	sedolisin	3
		S53.004	kumamolisin	11
		S53.006	physarolisin	10
		S53.009	kumamolisin-As	1
		S53.010	grifolisin	9
		S53.011	scytalidolisin	2
		S9G.103	PofibS endopeptidase (Philodryas olfersii)	1
		T01.002	archaean proteasome, beta component	3
insulin growth factor-like family member 1	Q6UW32	XS26.001	signal peptidase complex (animal)	1
insulin growth factor-like family member 3	Q6UXB1	XS26.001	signal peptidase complex (animal)	1
insulin I	P01325	S08.072	PCSK1 peptidase	1
		S08.073	PCSK2 peptidase	1
insulin II	P01326	S08.072	PCSK1 peptidase	1
		S08.073	PCSK2 peptidase	1
insulin peptide B1-B16	P01317	A9G.010	pycnoporopepsin	2
insulin precursor	P01308	A01.030	yapsin-1	1
		A9G.020	yapsin A	2
		S08.072	PCSK1 peptidase	2
		S08.073	PCSK2 peptidase	1
	P01317	XS26.001	signal peptidase complex (animal)	1
Insulin receptor	P06213	S08.073	PCSK2 peptidase	1
		S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
	P06213-1	S08.075	PCSK6 peptidase	1
insulin receptor precursor	P06213	S08.071	furin	1
Insulin receptor substrate 2	Q9Y4H2	C01.060	cathepsin B	1
insulin receptor substrate 4	O14654	A02.001	HIV-1 retropepsin	1
Insulin receptor substrate 4		M12.001	astacin	1
		M12.004	meprin beta subunit	1
		M12.033	LAST_MAM peptidase (Limulus-type)	1
insulin receptor substrate 4		S01.151	trypsin 1	8
		S01.217	thrombin	1
		S01.269	glutamyl endopeptidase I	2
insulin receptor subunit beta	P06213	XS26.001	signal peptidase complex (animal)	1
insulin-1	P01322	S08.072	PCSK1 peptidase	2
		S08.073	PCSK2 peptidase	2
insulin-1 A chain		XS26.001	signal peptidase complex (animal)	1
	P01325	XS26.001	signal peptidase complex (animal)	1
	P12706	XS26.001	signal peptidase complex (animal)	1
insulin-2	P01323	S08.072	PCSK1 peptidase	2
		S08.073	PCSK2 peptidase	2
		XS26.001	signal peptidase complex (animal)	1
insulin-2 A chain	P01326	XS26.001	signal peptidase complex (animal)	1
	P12707	XS26.001	signal peptidase complex (animal)	1
Insulin-degrading enzyme	P14735	C13.004	legumain, animal-type	1
		M04.001	thermolysin	2
		M10.005	matrix metallopeptidase-3	1
		S01.269	glutamyl endopeptidase I	1
Insulin-degrading enzyme ECO:0000303\|PubMed:20364150		C01.036	cathepsin K	1
insulin-like 3 A chain	O77801	XS26.001	signal peptidase complex (animal)	1
	P51460	XS26.001	signal peptidase complex (animal)	1
insulin-like growth factor 1 receptor beta chain	P08069	XS26.001	signal peptidase complex (animal)	1
insulin-like growth factor 2 mRNA binding protein 2	A0A4Z0	S01.151	trypsin 1	2
Insulin-like growth factor 2 mRNA-binding protein 1	Q9NZI8	C01.009	cathepsin V	3
		C01.018	cathepsin F	1
		C01.032	cathepsin L	3
		C01.034	cathepsin S	1
		C01.036	cathepsin K	13
		C01.060	cathepsin B	9
insulin-like growth factor 2 mRNA-binding protein 1		M10.003	matrix metallopeptidase-2	4
Insulin-like growth factor 2 mRNA-binding protein 1		M12.002	meprin alpha subunit	1
		S01.010	granzyme B (Homo sapiens-type)	2
		S01.021	DESC1 peptidase	2
insulin-like growth factor 2 mRNA-binding protein 1		S01.151	trypsin 1	8
		S01.269	glutamyl endopeptidase I	2
Insulin-like growth factor 2 mRNA-binding protein 1		S01.308	matriptase-2	2
Insulin-like growth factor 2 mRNA-binding protein 2	Q9Y6M1	C01.036	cathepsin K	6
		C01.060	cathepsin B	1
insulin-like growth factor 2 mRNA-binding protein 2		M10.003	matrix metallopeptidase-2	1
		S01.151	trypsin 1	5
Insulin-like growth factor 2 mRNA-binding protein 3	O00425	C01.009	cathepsin V	3
		C01.018	cathepsin F	1
		C01.032	cathepsin L	1
		C01.034	cathepsin S	2
		C01.036	cathepsin K	6
		C01.060	cathepsin B	5
		S01.010	granzyme B (Homo sapiens-type)	2
insulin-like growth factor 2 mRNA-binding protein 3		S01.151	trypsin 1	8
Insulin-like growth factor 2 mRNA-binding protein 3		S01.302	matriptase	1
insulin-like growth factor binding protein 3	P17936	A01.009	cathepsin D	4
		C01.032	cathepsin L	1
		M10.001	matrix metallopeptidase-1	5
		M10.003	matrix metallopeptidase-2	5
		M10.005	matrix metallopeptidase-3	4
		M10.008	matrix metallopeptidase-7	2
		S01.131	elastase-2	2
		S01.133	cathepsin G	2
		S01.162	kallikrein-related peptidase 3	2
		S01.217	thrombin	2
		S01.233	plasmin	7
insulin-like growth factor binding protein 4 precursor	P22692	A01.009	cathepsin D	1
		C02.001	calpain-1	4
		M43.004	pappalysin-1	1
insulin-like growth factor binding protein 5	P24593	C02.001	calpain-1	3
		M43.004	pappalysin-1	2
		M72.001	peptidyl-Asp metallopeptidase	2
		S01.132	mannan-binding lectin-associated serine peptidase-3	3
		S01.217	thrombin	3
insulin-like growth factor binding protein-5		M43.005	pappalysin-2	1
Insulin-like growth factor I	P05019	S08.071	furin	1
		S08.073	PCSK2 peptidase	1
		S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
insulin-like growth factor IA	P01343	C01.060	cathepsin B	4
insulin-like growth factor II	P01344	A26.001	omptin	1
		M16.002	insulysin	11
Insulin-like growth factor II		S08.071	furin	1
		S08.073	PCSK2 peptidase	1
		S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
insulin-like growth factor II	P01346	XS26.001	signal peptidase complex (animal)	1
	P07456	XS26.001	signal peptidase complex (animal)	1
	P10764	XS26.001	signal peptidase complex (animal)	1
insulin-like growth factor II Ala-25 Del	P01344	XS26.001	signal peptidase complex (animal)	1
insulin-like growth factor-binding protein 1	A4D2F4	M10.004	matrix metallopeptidase-9	1
		M10.005	matrix metallopeptidase-3	2
		M10.008	matrix metallopeptidase-7	1
	P08833	M10.007	matrix metallopeptidase-11	1
		M10.029	matrix metallopeptidase-26	1
Insulin-like growth factor-binding protein 1		S01.017	kallikrein-related peptidase 5	2
insulin-like growth factor-binding protein 1		S01.302	matriptase	1
		XS26.001	signal peptidase complex (animal)	1
	P21743	XS26.001	signal peptidase complex (animal)	1
insulin-like growth factor-binding protein 2	P12843	XS26.001	signal peptidase complex (animal)	1
	P13384	XS26.001	signal peptidase complex (animal)	1
	P18065	M10.008	matrix metallopeptidase-7	3
Insulin-like growth factor-binding protein 2		S01.017	kallikrein-related peptidase 5	2
		S01.081	kallikrein-related peptidase 15	1
insulin-like growth factor-binding protein 2		S01.161	kallikrein-related peptidase 2	1
		XS26.001	signal peptidase complex (animal)	1
insulin-like growth factor-binding protein 3	P15473	XS26.001	signal peptidase complex (animal)	1
	P16611	XS26.001	signal peptidase complex (animal)	1
Insulin-like growth factor-binding protein 3	P17936	M12.002	meprin alpha subunit	3
		M12.004	meprin beta subunit	4
insulin-like growth factor-binding protein 3		M12.005	procollagen C-peptidase	1
		M12.020	ADAM28 peptidase (mouse-type)	1
		M12.224	ADAM28 peptidase (Homo sapiens-type)	1
Insulin-like growth factor-binding protein 3		S01.017	kallikrein-related peptidase 5	2
		S01.081	kallikrein-related peptidase 15	3
insulin-like growth factor-binding protein 3		S01.300	kallikrein-related peptidase 7	1
	P20959	XS26.001	signal peptidase complex (animal)	1
	P47878	M12.005	procollagen C-peptidase	1
Insulin-like growth factor-binding protein 3 precursor	P17936	S01.017	kallikrein-related peptidase 5	1
insulin-like growth factor-binding protein 3 precursor		XS26.001	signal peptidase complex (animal)	1
insulin-like growth factor-binding protein 4	P21744	XS26.001	signal peptidase complex (animal)	1
	P22692	C02.001	calpain-1	2
		C02.002	calpain-2	4
Insulin-like growth factor-binding protein 4		S01.017	kallikrein-related peptidase 5	1
		S01.081	kallikrein-related peptidase 15	1
insulin-like growth factor-binding protein 4		XS26.001	signal peptidase complex (animal)	1
	P24854	XS26.001	signal peptidase complex (animal)	1
Insulin-like growth factor-binding protein 4	P47879	M10.003	matrix metallopeptidase-2	5
		M10.004	matrix metallopeptidase-9	1
Insulin-like growth factor-binding protein 4 precursor	P22692	S01.017	kallikrein-related peptidase 5	1
insulin-like growth factor-binding protein 5	P24593	C02.001	calpain-1	2
		C02.002	calpain-2	3
		M10.024	membrane-type matrix metallopeptidase-6	4
Insulin-like growth factor-binding protein 5		S01.017	kallikrein-related peptidase 5	3
		S01.081	kallikrein-related peptidase 15	1
Insulin-like growth factor-binding protein 6	P24592	M12.002	meprin alpha subunit	1
		M12.004	meprin beta subunit	1
		S01.081	kallikrein-related peptidase 15	3
insulin-like growth factor-binding protein 6		S01.300	kallikrein-related peptidase 7	2
	P35572	XS26.001	signal peptidase complex (animal)	1
Insulin-like growth factor-binding protein 6	P47880	M10.003	matrix metallopeptidase-2	2
insulin-like growth factor-binding protein 7	Q16270	M10.024	membrane-type matrix metallopeptidase-6	3
Insulin-like growth factor-binding protein 7		M12.002	meprin alpha subunit	1
		S01.269	glutamyl endopeptidase I	1
insulin-like growth factor-binding protein 7		XS26.001	signal peptidase complex (animal)	1
insulin-like growth factor-binding protein 7 precursor		S01.302	matriptase	1
insulin-like growth factor-binding protein complex acid labile chain	P35858	XS26.001	signal peptidase complex (animal)	1
	P35859	XS26.001	signal peptidase complex (animal)	1
insulin-like peptide INSL5 A chain	Q9Y5Q6	XS26.001	signal peptidase complex (animal)	1
Insulinoma-associated protein 1	Q01101	S01.280	lysyl endopeptidase (bacteria)	2
insulysin	P14735	S01.151	trypsin 1	12
integral membrane protein 2B	Q9Y287	S08.071	furin	1
Integration host factor subunit alpha	P0A1S0	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
integration host factor subunit alpha	P0A6X7	S01.269	glutamyl endopeptidase I	1
Integration host factor subunit beta	P0A6Y1	S01.151	trypsin 1	1
		S41.011	chlamydial protease-like activity factor	2
Integrator complex subunit 1	Q8N201	C01.036	cathepsin K	2
Integrator complex subunit 12	Q96CB8	S01.139	granzyme M	1
Integrator complex subunit 3	Q9H6S9	C01.032	cathepsin L	1
		C01.036	cathepsin K	1
Integrator complex subunit 7	Q9UFC6	C14.005	caspase-6	1
Integrin alpha 5	Q80YP5	S08.071	furin	1
Integrin alpha-11	Q9UKX5	C01.018	cathepsin F	1
integrin alpha-11 precursor		S01.151	trypsin 1	1
integrin alpha-11 precursor natural variant rs4777035		S01.151	trypsin 1	1
Integrin alpha-2	P17301	C01.034	cathepsin S	5
		C01.036	cathepsin K	1
		M10.005	matrix metallopeptidase-3	2
		S01.151	trypsin 1	13
integrin alpha-2		XS26.001	signal peptidase complex (animal)	1
Integrin alpha-3	P26006	C01.009	cathepsin V	4
		C01.032	cathepsin L	2
		C01.034	cathepsin S	1
		C01.036	cathepsin K	5
		M04.001	thermolysin	2
		M10.005	matrix metallopeptidase-3	5
		S01.081	kallikrein-related peptidase 15	1
		S01.151	trypsin 1	14
		S01.269	glutamyl endopeptidase I	7
		S08.073	PCSK2 peptidase	1
		S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
integrin alpha-3 light chain		XS26.001	signal peptidase complex (animal)	1
integrin alpha-3 precursor		S08.071	furin	1
Integrin alpha-4	P13612	C14.005	caspase-6	1
integrin alpha-4		S08.071	furin	1
Integrin alpha-4		S08.073	PCSK2 peptidase	1
		S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
integrin alpha-4		S08.076	PCSK5 peptidase	1
Integrin alpha-4		S08.077	PCSK7 peptidase	1
integrin alpha-4 precursor		XS26.001	signal peptidase complex (animal)	1
Integrin alpha-5	P08648	M09.003	bacterial collagenase H	1
		S01.269	glutamyl endopeptidase I	2
		S08.071	furin	1
		S08.073	PCSK2 peptidase	1
		S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
integrin alpha-5 light chain		XS26.001	signal peptidase complex (animal)	1
integrin alpha-6	P23229	S01.010	granzyme B (Homo sapiens-type)	8
Integrin alpha-6		S01.151	trypsin 1	9
integrin alpha-6		S01.231	urokinase-type plasminogen activator	1
Integrin alpha-6		S01.269	glutamyl endopeptidase I	3
integrin alpha-6		S08.071	furin	1
Integrin alpha-6		S08.073	PCSK2 peptidase	1
		S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
integrin alpha-6	Q61739	M10.006	matrix metallopeptidase-10 (Homo sapiens-type)	1
integrin alpha-6 precursor	P23229	XS26.001	signal peptidase complex (animal)	1
Integrin alpha-7	Q13683	S08.071	furin	1
		S08.073	PCSK2 peptidase	1
		S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
integrin alpha-7 light chain		XS26.001	signal peptidase complex (animal)	1
	Q61738	XS26.001	signal peptidase complex (animal)	1
Integrin alpha-8	P53708	S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
integrin alpha-E heavy chain	P38570	XS26.001	signal peptidase complex (animal)	1
integrin alpha-E precursor		M10.003	matrix metallopeptidase-2	1
		S01.269	glutamyl endopeptidase I	1
Integrin alpha-IIb	P08514	S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
integrin alpha-IIb light chain, form 2		XS26.001	signal peptidase complex (animal)	1
integrin alpha-L	P24063	XS26.001	signal peptidase complex (animal)	1
integrin alpha-M	P05555	XS26.001	signal peptidase complex (animal)	1
	P11215	XS26.001	signal peptidase complex (animal)	1
integrin alpha-V	P06756	M10.014	membrane-type matrix metallopeptidase-1	1
Integrin alpha-V		S08.071	furin	1
		S08.073	PCSK2 peptidase	1
		S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
integrin alpha-V light chain		XS26.001	signal peptidase complex (animal)	1
	P80746	XS26.001	signal peptidase complex (animal)	1
integrin alpha-X	P20702	XS26.001	signal peptidase complex (animal)	1
integrin beta 3 subunit		C02.001	calpain-1	2
Integrin beta-1	P05556	C01.009	cathepsin V	4
		C01.032	cathepsin L	4
		C01.034	cathepsin S	5
		C01.036	cathepsin K	4
integrin beta-1		C02.001	calpain-1	3
		C02.002	calpain-2	1
Integrin beta-1		C13.004	legumain, animal-type	4
		M10.005	matrix metallopeptidase-3	5
		S01.151	trypsin 1	16
		S01.269	glutamyl endopeptidase I	12
	Q8WUM6	S01.081	kallikrein-related peptidase 15	2
Integrin beta-2	P05107	A32.002	RC1339 g.p. (Rickettsia conorii)	1
integrin beta-2		C02.001	calpain-1	4
		C02.002	calpain-2	4
Integrin beta-2	P11835	M10.004	matrix metallopeptidase-9	1
integrin beta-2 precursor	P05107	C02.002	calpain-2	3
integrin beta-3	P05106	C02.001	calpain-1	3
		C02.002	calpain-2	3
integrin beta-3 precursor		C02.001	calpain-1	5
Integrin beta-3 precursor		XS26.001	signal peptidase complex (animal)	1
Integrin beta-4	P16144	C14.003	caspase-3	1
		C14.004	caspase-7	1
		M10.005	matrix metallopeptidase-3	2
integrin beta-4		S01.010	granzyme B (Homo sapiens-type)	7
Integrin beta-4		S01.151	trypsin 1	10
		S01.269	glutamyl endopeptidase I	5
integrin beta-4		XS26.001	signal peptidase complex (animal)	1
Integrin beta-4	P16144-5	M12.001	astacin	1
	Q9UIQ4	S01.081	kallikrein-related peptidase 15	2
integrin beta-5	P80747	XS26.001	signal peptidase complex (animal)	1
integrin beta-7	P26010	C02.001	calpain-1	3
		C02.002	calpain-2	4
		XS26.001	signal peptidase complex (animal)	1
	P26011	XS26.001	signal peptidase complex (animal)	1
Integrin beta-like protein 1	O95965	S01.081	kallikrein-related peptidase 15	1
Integrin-linked kinase-associated serine/threonine phosphatase 2C	Q9H0C8	C01.009	cathepsin V	1
		C01.018	cathepsin F	2
		C01.036	cathepsin K	6
		C01.060	cathepsin B	3
		S01.139	granzyme M	1
integrin-linked kinase-associated serine/threonine phosphatase 2C		S01.151	trypsin 1	2
Integrin-linked protein kinase	Q13418	C01.034	cathepsin S	1
intelectin-1	Q8WWA0	XS26.001	signal peptidase complex (animal)	1
Inter-alpha-trypsin inhibitor heavy chain H1 precursor	P19827	M35.004	peptidyl-Lys metallopeptidase	2
		S01.251	kallikrein-related peptidase 4	1
Inter-alpha-trypsin inhibitor heavy chain H2	P19823	S01.081	kallikrein-related peptidase 15	2
Inter-alpha-trypsin inhibitor heavy chain H2 precursor		S01.251	kallikrein-related peptidase 4	1
Inter-alpha-trypsin inhibitor heavy chain H3	Q06033	M12.002	meprin alpha subunit	1
		M12.004	meprin beta subunit	1
Inter-alpha-trypsin inhibitor heavy chain H3 precursor		S01.251	kallikrein-related peptidase 4	1
inter-alpha-trypsin inhibitor heavy chain H4	P79263	XS26.001	signal peptidase complex (animal)	1
Inter-alpha-trypsin inhibitor heavy chain H4 precursor	Q14624	XS26.001	signal peptidase complex (animal)	1
Intercellular adhesion molecule 1	P05362	S01.081	kallikrein-related peptidase 15	3
interferon alpha-1/13	P01562	XS26.001	signal peptidase complex (animal)	1
interferon alpha-10	P01566	XS26.001	signal peptidase complex (animal)	1
interferon alpha-14	P01570	XS26.001	signal peptidase complex (animal)	1
interferon alpha-17	P01571	XS26.001	signal peptidase complex (animal)	1
interferon alpha-2	P01563	XS26.001	signal peptidase complex (animal)	1
interferon alpha-21	P01568	XS26.001	signal peptidase complex (animal)	1
Interferon alpha-2b	P01563	A01.036	axp peptidase (Yarrowia lipolytica)	1
interferon alpha-4	P05014	XS26.001	signal peptidase complex (animal)	1
interferon alpha-5	P01569	XS26.001	signal peptidase complex (animal)	1
interferon alpha-6	P05013	XS26.001	signal peptidase complex (animal)	1
interferon alpha-7	P01567	XS26.001	signal peptidase complex (animal)	1
interferon alpha-8	P32881	XS26.001	signal peptidase complex (animal)	1
interferon beta precursor	P01574	M10.004	matrix metallopeptidase-9	5
interferon gamma	P01579	XS26.001	signal peptidase complex (animal)	1
interferon kappa	Q9P0W0	XS26.001	signal peptidase complex (animal)	1
interferon omega-1	P05000	XS26.001	signal peptidase complex (animal)	1
Interferon regulatory factor 2	P14316	C14.005	caspase-6	1
Interferon regulatory factor 2-binding protein 1	Q8IU81	C01.036	cathepsin K	3
		C01.060	cathepsin B	1
Interferon regulatory factor 2-binding protein 2	E9Q1P8	A01.009	cathepsin D	2
		A01.010	cathepsin E	2
	Q7Z5L9	A32.002	RC1339 g.p. (Rickettsia conorii)	1
		C01.009	cathepsin V	3
		C01.018	cathepsin F	7
		C01.032	cathepsin L	3
		C01.034	cathepsin S	1
		C01.036	cathepsin K	7
		C01.060	cathepsin B	6
Interferon regulatory factor 2-binding protein-like	Q9H1B7	C14.005	caspase-6	1
		M10.005	matrix metallopeptidase-3	2
interferon regulatory factor 3	Q14653	C16.012	coronavirus COVID-19 papain-like peptidase	2
Interferon regulatory factor 6	O14896	S01.280	lysyl endopeptidase (bacteria)	2
Interferon regulatory factor 9	Q00978	M09.003	bacterial collagenase H	1
interferon tau-2	P56829	XS26.001	signal peptidase complex (animal)	1
interferon-induced 17 kDa protein	P05161	C19.030	ubiquitin-specific peptidase 18	1
		C87.001	nairovirus deubiquitinylating peptidase	1
Interferon-induced 35 kDa protein	P80217	M10.005	matrix metallopeptidase-3	1
Interferon-induced guanylate-binding protein 2	Q9Z0E6	A01.009	cathepsin D	1
interferon-induced helicase C domain-containing protein 1	Q8R5F7	C14.003	caspase-3	2
		C14.009	caspase-8	1
Interferon-induced protein with tetratricopeptide repeats 1B	Q5T764	S01.280	lysyl endopeptidase (bacteria)	2
Interferon-induced protein with tetratricopeptide repeats 2	P09913	M35.004	peptidyl-Lys metallopeptidase	2
Interferon-induced protein with tetratricopeptide repeats 3	O14879	S01.280	lysyl endopeptidase (bacteria)	2
Interferon-induced transmembrane protein 1	P13164	C01.036	cathepsin K	1
Interferon-induced transmembrane protein 2	Q01629	C01.034	cathepsin S	1
Interferon-induced transmembrane protein 3	Q01628	M04.001	thermolysin	1
Interferon-induced very large GTPase 1	Q7Z2Y8	M35.004	peptidyl-Lys metallopeptidase	2
Interferon-induced, double-stranded RNA-activated protein kinase	P19525	C01.032	cathepsin L	1
		C01.060	cathepsin B	1
interferon-induced, double-stranded RNA-activated protein kinase		C14.003	caspase-3	1
		C14.004	caspase-7	1
		C14.009	caspase-8	1
Interferon-induced, double-stranded RNA-activated protein kinase		M09.002	collagenase G/A (Clostridium histolyticum)	2
		M09.003	bacterial collagenase H	1
		M09.005	collagenase ColT (Clostridium tetani)	2
		S01.010	granzyme B (Homo sapiens-type)	1
interferon-induced, double-stranded RNA-activated protein kinase		S01.151	trypsin 1	3
interferon-inducible double-stranded RNA-dependent protein kinase, Isoform 2	P19525-2	S01.151	trypsin 1	2
Interferon-related developmental regulator 1	O00458	C01.036	cathepsin K	1
		S01.010	granzyme B (Homo sapiens-type)	1
interleukin enhancer binding factor 3 isoform c variant	Q59GP7	A02.001	HIV-1 retropepsin	2
		M10.003	matrix metallopeptidase-2	2
		S01.151	trypsin 1	14
		S01.269	glutamyl endopeptidase I	5
interleukin enhancer-binding factor 2	Q12905	A02.001	HIV-1 retropepsin	1
Interleukin enhancer-binding factor 2		A32.002	RC1339 g.p. (Rickettsia conorii)	1
		C01.009	cathepsin V	7
		C01.032	cathepsin L	6
		C01.034	cathepsin S	3
		C01.036	cathepsin K	2
		C01.060	cathepsin B	3
		C13.004	legumain, animal-type	1
		M04.001	thermolysin	2
interleukin enhancer-binding factor 2		M10.003	matrix metallopeptidase-2	2
		S01.151	trypsin 1	18
		S01.217	thrombin	1
		S01.269	glutamyl endopeptidase I	3
Interleukin enhancer-binding factor 3	Q12906	C01.009	cathepsin V	2
		C01.032	cathepsin L	11
		C01.034	cathepsin S	1
		C01.060	cathepsin B	1
		C13.004	legumain, animal-type	5
		C14.004	caspase-7	1
		M04.001	thermolysin	2
		M10.005	matrix metallopeptidase-3	6
		M12.002	meprin alpha subunit	1
		M12.004	meprin beta subunit	2
		M12.033	LAST_MAM peptidase (Limulus-type)	1
		M35.004	peptidyl-Lys metallopeptidase	2
		S01.010	granzyme B (Homo sapiens-type)	2
		S01.136	granzyme B, rodent-type	1
		S01.139	granzyme M	2
interleukin enhancer-binding factor 3		S01.151	trypsin 1	27
Interleukin enhancer-binding factor 3		S01.269	glutamyl endopeptidase I	4
	Q9NRN2	C01.009	cathepsin V	1
		C01.018	cathepsin F	3
		C01.032	cathepsin L	3
		C01.036	cathepsin K	12
		C01.060	cathepsin B	6
	Q9UNA2	A32.002	RC1339 g.p. (Rickettsia conorii)	1
		C14.005	caspase-6	1
		S01.081	kallikrein-related peptidase 15	1
		S01.224	hepsin	1
Interleukin enhancer-binding factor 3 isoform 4	Q12906-4	A02.001	HIV-1 retropepsin	2
		C14.003	caspase-3	2
		C14.004	caspase-7	2
		M10.003	matrix metallopeptidase-2	3
		S01.151	trypsin 1	7
		S01.269	glutamyl endopeptidase I	5
interleukin-1 alpha	P01583	C02.001	calpain-1	4
		C02.002	calpain-2	4
Interleukin-1 alpha precursor		S01.251	kallikrein-related peptidase 4	1
Interleukin-1 beta	P01584	M10.003	matrix metallopeptidase-2	1
interleukin-1 beta		M12.002	meprin alpha subunit	1
		M12.004	meprin beta subunit	1
Interleukin-1 beta		S09.013	dipeptidyl-peptidase 4 (bacteria-type 2)	1
interleukin-1 beta	P10749	C14.001	caspase-1	3
Interleukin-1 beta		S01.173	kallikrein 13 (Mus musculus)	1
interleukin-1 beta precursor	P01584	A02.001	HIV-1 retropepsin	2
		A02.002	HIV-2 retropepsin	1
		C10.001	streptopain	1
		C14.001	caspase-1	2
		C14.007	caspase-4	2
		S01.131	elastase-2	1
		S01.133	cathepsin G	1
		S01.135	granzyme A	1
		S01.140	chymase (Homo sapiens-type)	1
		S01.151	trypsin 1	1
		S01.153	elastase-1	1
Interleukin-1 beta precursor	P10749	S01.306	kallikrein-related peptidase 13	1
interleukin-1 receptor antagonist protein, Isoform 4	P18510-4	XS26.001	signal peptidase complex (animal)	1
interleukin-1 receptor type I	P13504	XS26.001	signal peptidase complex (animal)	1
Interleukin-1 receptor-associated kinase 1	P51617	S01.139	granzyme M	2
interleukin-1 receptor-like 1	Q01638	XS26.001	signal peptidase complex (animal)	1
interleukin-10	P22301	XS26.001	signal peptidase complex (animal)	1
interleukin-10 receptor alpha chain	Q13651	XS26.001	signal peptidase complex (animal)	1
interleukin-10 receptor beta chain	Q08334	XS26.001	signal peptidase complex (animal)	1
interleukin-11 receptor alpha-1 chain	Q64385	XS26.001	signal peptidase complex (animal)	1
interleukin-11 receptor subunit alpha	Q14626	S54.002	rhomboid-like protein 2	1
Interleukin-12 receptor subunit beta-1	P42701	C01.009	cathepsin V	1
interleukin-12 subunit alpha	P29459	XS26.001	signal peptidase complex (animal)	1
interleukin-12 subunit beta	P29460	XS26.001	signal peptidase complex (animal)	1
interleukin-16 precursor, Isoform 3	Q14005-3	C14.003	caspase-3	1
interleukin-17 receptor A	Q96F46	XS26.001	signal peptidase complex (animal)	1
interleukin-17 receptor B	Q9NRM6	XS26.001	signal peptidase complex (animal)	1
interleukin-17 receptor C	Q8NAC3	XS26.001	signal peptidase complex (animal)	1
interleukin-17A	Q16552	XS26.001	signal peptidase complex (animal)	1
interleukin-17F	Q96PD4	XS26.001	signal peptidase complex (animal)	1
Interleukin-18	Q14116	C01.032	cathepsin L	1
interleukin-18		C14.003	caspase-3	2
		M12.004	meprin beta subunit	1
		S01.140	chymase (Homo sapiens-type)	2
Interleukin-18		S01.269	glutamyl endopeptidase I	3
interleukin-18 precursor		C14.001	caspase-1	1
Interleukin-18 precursor		C14.007	caspase-4	1
		S01.150	mast cell peptidase 5 (mouse numbering)	2
interleukin-18 receptor 1	Q13478	XS26.001	signal peptidase complex (animal)	1
Interleukin-18 ECO:0000303\|PubMed:14528293, ECO:0000303\|PubMed:25261253, ECO:0000303\|PubMed:25500532	Q14116	C01.009	cathepsin V	1
		C01.032	cathepsin L	1
interleukin-18-binding protein	O95998	XS26.001	signal peptidase complex (animal)	1
	Q9Z0M9	XS26.001	signal peptidase complex (animal)	1
interleukin-19	Q9UHD0	XS26.001	signal peptidase complex (animal)	1
Interleukin-2	P60568	S09.013	dipeptidyl-peptidase 4 (bacteria-type 2)	1
interleukin-2		XS26.001	signal peptidase complex (animal)	1
interleukin-20	Q9NYY1	XS26.001	signal peptidase complex (animal)	1
interleukin-20 receptor alpha chain precursor	Q9UHF4	C11.001	clostripain	2
interleukin-20 receptor alpha chain, Isoform 2	Q9UHF4-2	XS26.001	signal peptidase complex (animal)	1
interleukin-20 receptor beta chain	Q6UXL0	XS26.001	signal peptidase complex (animal)	1
interleukin-21 receptor	Q9HBE5	XS26.001	signal peptidase complex (animal)	1
interleukin-22	Q9GZX6	XS26.001	signal peptidase complex (animal)	1
interleukin-22 receptor subunit alpha-2	Q969J5	XS26.001	signal peptidase complex (animal)	1
interleukin-24	Q13007	XS26.001	signal peptidase complex (animal)	1
interleukin-25, Isoform 2	Q9H293-2	XS26.001	signal peptidase complex (animal)	1
interleukin-31 receptor A, Isoform 12	Q8NI17-12	XS26.001	signal peptidase complex (animal)	1
interleukin-32	P24001	S01.134	myeloblastin	1
interleukin-33	O95760	C14.001	caspase-1	1
interleukin-5	P05113	XS26.001	signal peptidase complex (animal)	1
interleukin-6	P05231	C25.001	gingipain RgpA	2
		C25.002	gingipain K	1
Interleukin-6		S01.081	kallikrein-related peptidase 15	1
interleukin-6		S09.017	prolyl tripeptidyl peptidase	1
		XS26.001	signal peptidase complex (animal)	1
	P08505	XS26.001	signal peptidase complex (animal)	1
interleukin-6 receptor subunit alpha	P08887	C01.034	cathepsin S	1
		M12.210	ADAM10 peptidase	1
		M12.217	ADAM17 peptidase	1
		XS26.001	signal peptidase complex (animal)	1
interleukin-8	P10145	C01.032	cathepsin L	1
		C25.001	gingipain RgpA	2
		C25.002	gingipain K	3
		M10.001	matrix metallopeptidase-1	1
		M10.002	matrix metallopeptidase-8	1
		M10.004	matrix metallopeptidase-9	1
		M10.013	matrix metallopeptidase-13	1
		M10.014	membrane-type matrix metallopeptidase-1	1
		XS26.001	signal peptidase complex (animal)	1
	P19874	XS26.001	signal peptidase complex (animal)	1
	P26894	XS26.001	signal peptidase complex (animal)	1
Interleukin-8	Q9UCR9	S01.081	kallikrein-related peptidase 15	2
interleukin-8 precursor	P10145	S08.027	cell envelope peptidase A (Streptococcus-type)	1
interleukin-9	P15247	XS26.001	signal peptidase complex (animal)	1
Intermembrane phospholipid transport system binding protein MlaC	P0ADV7	M12.221	ADAMTS4 peptidase	2
internal protein I	P03718	S77.001	prohead peptidase gp21 (bacteriophage T4)	1
internal protein II	P03719	S77.001	prohead peptidase gp21 (bacteriophage T4)	1
internal protein III	P13302	S77.001	prohead peptidase gp21 (bacteriophage T4)	1
interpain A	A9J7N5	C10.004	interpain A	4
Intersectin-1	Q15811	S01.010	granzyme B (Homo sapiens-type)	1
Intersectin-2	Q9NZM3	C01.009	cathepsin V	1
		C01.032	cathepsin L	1
		C01.036	cathepsin K	1
		C01.060	cathepsin B	1
interstitial collagenase	P03956	M10.024	membrane-type matrix metallopeptidase-6	2
Interstitial collagenase		M12.002	meprin alpha subunit	2
		M12.004	meprin beta subunit	1
interstitial collagenase		S01.300	kallikrein-related peptidase 7	4
Interstitial collagenase precursor		M12.004	meprin beta subunit	1
Interstitial collagenase propeptide		S08.073	PCSK2 peptidase	1
		S08.074	PCSK4 peptidase	1
		S08.075	PCSK6 peptidase	1
		S08.076	PCSK5 peptidase	1
		S08.077	PCSK7 peptidase	1
intestinal alkaline phosphatase	P09923	XS26.001	signal peptidase complex (animal)	1
	P19111	XS26.001	signal peptidase complex (animal)	1
intestinal alkaline phosphatase 1	P15693	XS26.001	signal peptidase complex (animal)	1
intestinal alkaline phosphatase 2	P51740	XS26.001	signal peptidase complex (animal)	1
Intracellular hyaluronan-binding protein 4	Q5JVS0	S01.021	DESC1 peptidase	1
		S01.302	matriptase	1
		S01.308	matriptase-2	1
intracellular platelet-activating factor acetylhydrolase alpha 2 subunit variant 4	A8DPS6	M10.003	matrix metallopeptidase-2	1
		S01.151	trypsin 1	1
intracellular platelet-activating factor acetylhydrolase alpha 2 subunit variant 5	A8DPS5	M10.003	matrix metallopeptidase-2	1
		S01.151	trypsin 1	1
Intraflagellar transport protein 140 homolog	Q96RY7	M12.004	meprin beta subunit	1
		S01.224	hepsin	1
intraflagellar transport protein 20 homolog	Q8IY31	S01.151	trypsin 1	2
Intraflagellar transport protein 25 homolog	Q9Y547	S01.151	trypsin 1	1
Intraflagellar transport protein 27 homolog	Q9BW83	C01.009	cathepsin V	1
		C01.032	cathepsin L	1
Intraflagellar transport protein 80 homolog	Q9P2H3	M35.004	peptidyl-Lys metallopeptidase	2
Intraflagellar transport protein 88 homolog	Q13099	C14.005	caspase-6	1
Intron-binding protein aquarius	O60306	M10.005	matrix metallopeptidase-3	1
Inversin	Q9Y283	A32.002	RC1339 g.p. (Rickettsia conorii)	1
invertase 2	P00724	S26.010	signalase (animal) 21 kDa component	1
Invertase 2 precursor		XS26.001	signal peptidase complex (animal)	1
Inverted formin-2	Q27J81	C01.032	cathepsin L	1
		C01.034	cathepsin S	2
		C14.001	caspase-1	1
		C14.005	caspase-6	3
		C14.006	caspase-2	1
		M09.005	collagenase ColT (Clostridium tetani)	2
		M10.005	matrix metallopeptidase-3	1
		S01.151	trypsin 1	3
		S01.269	glutamyl endopeptidase I	1
Involucrin	P07476	M12.002	meprin alpha subunit	2
		M12.004	meprin beta subunit	3
Iodotyrosine deiodinase 1 ECO:0000303\|PubMed:25395621	Q7Z7D8	C01.018	cathepsin F	1
Ion-translocating oxidoreductase complex subunit C	P77611	S01.151	trypsin 1	1
iota-toxin Ia precursor		M04.011	lambda toxin	1
iota-toxin Ib precursor		M04.011	lambda toxin	1
IpaB IpaB, secreted by the Mxi-Spa secretion machinery, required for entry into epithelial cells	P18011	S01.131	elastase-2	7
IQ motif and SEC7 domain-containing protein 2	Q5JU85	C14.004	caspase-7	1
IQ motif and SEC7 domain-containing protein 3	Q9UPP2	M35.004	peptidyl-Lys metallopeptidase	2
Iron uptake system component EfeO	P0AB24	M12.221	ADAMTS4 peptidase	1
Iron-binding protein iscA	Q7CQ12	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
Iron-dependent alcohol dehydrogenase of the multifunctional alcohol dehydrogenase AdhE	Q8ZP45	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
iron-regulated surface determinant protein A	Q2FZE9	C60.001	sortase A (Staphylococcus-type)	1
iron-regulated surface determinant protein B	Q2FZF0	C60.001	sortase A (Staphylococcus-type)	1
iron-regulated surface determinant protein C	Q8KQR1	C60.002	sortase B	1
iron-regulated surface determinant protein H	Q8NW39	C60.001	sortase A (Staphylococcus-type)	1
Iron-responsive element-binding protein 2	Q8WVK6	S01.081	kallikrein-related peptidase 15	1
iron-sulfur assembly protein IscA-like 2, mitochondrial	Q8LCY2	M24.A14	LCP55 (Arabidopsis thaliana)	1
Iron-sulfur cluster assembly enzyme ISCU, mitochondrial	Q9H1K1	M04.001	thermolysin	1
Iron-sulfur cluster assembly scaffold protein IscU	P0ACD4	S01.151	trypsin 1	1
Iron-sulfur cluster carrier protein	Q9YFL8	M04.001	thermolysin	3
Iron-sulfur cluster insertion protein erpA	Q7CR66	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
iron-sulfur cluster scaffold protein Nfu	Q7Z5B2	M10.003	matrix metallopeptidase-2	1
		S01.269	glutamyl endopeptidase I	1
iron-utilization periplasmic protein	P35755	S26.001	signal peptidase I	1
Iroquois-class homeodomain protein IRX-6	P78412	M35.004	peptidyl-Lys metallopeptidase	2
ISG15-gsPestC fusion protein	P0CG47	C19.030	ubiquitin-specific peptidase 18	1
islet amyloid polypeptide	Q0ZD87	M14.005	carboxypeptidase E	3
Islet cell autoantigen 1	Q05084	S01.072	matriptase-3	1
isoamyl acetate-hydrolyzing esterase 1 homolog	Q2TAA2	S01.151	trypsin 1	2
Isoamyl acetate-hydrolyzing esterase 1 homolog		S01.269	glutamyl endopeptidase I	1
Isoaspartyl dipeptidase	Q8ZJZ8	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
isochorismatase domain-containing protein 1	Q96CN7	M10.003	matrix metallopeptidase-2	1
		S01.001	chymotrypsin A (cattle-type)	1
		S01.151	trypsin 1	6
Isochorismatase domain-containing protein 2	Q96AB3	M09.002	collagenase G/A (Clostridium histolyticum)	2
		M09.005	collagenase ColT (Clostridium tetani)	2
		S01.269	glutamyl endopeptidase I	1
isocitrate dehydrogenase	Q13584	S01.151	trypsin 1	1
		S01.269	glutamyl endopeptidase I	1
Isocitrate dehydrogenase [NADP]	P08200	M12.221	ADAMTS4 peptidase	2
		M12.225	ADAMTS5 peptidase	2
		S01.151	trypsin 1	9
		S41.011	chlamydial protease-like activity factor	4
isocitrate dehydrogenase [NADP]	P16100	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
Isocitrate dehydrogenase [NADP]	Q9YE81	M04.001	thermolysin	8
Isocitrate dehydrogenase [NADP] cytoplasmic	O75874	C01.009	cathepsin V	3
		C01.032	cathepsin L	3
		C01.036	cathepsin K	3
		C01.060	cathepsin B	1
		M04.001	thermolysin	2
		M10.003	matrix metallopeptidase-2	2
		S01.081	kallikrein-related peptidase 15	2
		S01.151	trypsin 1	6
		S01.269	glutamyl endopeptidase I	2
	O88844	A01.009	cathepsin D	2
		A01.010	cathepsin E	1
Isocitrate dehydrogenase [NADP], mitochondrial	P48735	A32.002	RC1339 g.p. (Rickettsia conorii)	1
		C01.009	cathepsin V	1
		C01.032	cathepsin L	2
		C01.034	cathepsin S	1
		C01.036	cathepsin K	5
		M12.004	meprin beta subunit	1
isocitrate dehydrogenase [NADP], mitochondrial precursor		S01.151	trypsin 1	1
		S01.269	glutamyl endopeptidase I	1
Isocitrate dehydrogenase [NAD] catalytic subunit 5, mitochondrial	Q945K7	M10.038	At5-MMP (Arabidopsis thaliana)	1
		M10.A02	At4-MMP (Arabidopsis thaliana)	1
isocitrate dehydrogenase [NAD] subunit 2, mitochondrial	P28241	M16.003	mitochondrial processing peptidase beta-subunit	1
		M24.026	aminopeptidase P3	1
Isocitrate dehydrogenase [NAD] subunit alpha, mitochondrial	P50213	S01.151	trypsin 1	3
Isocitrate dehydrogenase [NAD] subunit alpha, mitochondrial ECO:0000305\|PubMed:28139779		C01.018	cathepsin F	1
		C01.036	cathepsin K	4
Isocitrate dehydrogenase [NAD] subunit beta, mitochondrial	Q9UEX0	C01.036	cathepsin K	2
Isocitrate dehydrogenase [NAD] subunit gamma, mitochondrial	P51553	C01.036	cathepsin K	1
isocitrate lyase	P0A9G6	C14.003	caspase-3	1
Isocitrate lyase		S01.151	trypsin 1	1
Isoleucine--tRNA ligase	P00956	A02.011	human endogenous retrovirus K retropepsin	1
		C14.003	caspase-3	1
		M12.025	ADAMTS15 peptidase	1
		M12.221	ADAMTS4 peptidase	3
		S01.151	trypsin 1	1
		S41.011	chlamydial protease-like activity factor	1
	Q9YF67	M04.001	thermolysin	11
Isoleucine--tRNA ligase, cytoplasmic	P41252	C01.009	cathepsin V	5
		C01.018	cathepsin F	1
		C01.032	cathepsin L	6
		C01.036	cathepsin K	14
		C01.060	cathepsin B	1
		M09.002	collagenase G/A (Clostridium histolyticum)	3
		M09.005	collagenase ColT (Clostridium tetani)	1
		S01.151	trypsin 1	18
Isoleucine--tRNA ligase, mitochondrial	Q9NSE4	C01.032	cathepsin L	3
		C01.034	cathepsin S	2
		C01.036	cathepsin K	1
		M10.005	matrix metallopeptidase-3	1
		S01.151	trypsin 1	6
		S01.269	glutamyl endopeptidase I	2
	Q9NW42	A32.002	RC1339 g.p. (Rickettsia conorii)	1
		C14.005	caspase-6	2
isoleucyl bond		S01.273	DegP peptidase	1
isoleucyl-tRNA synthetase	P00956	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
	Q5TCC4	S01.151	trypsin 1	4
	Q5TCD2	S01.151	trypsin 1	4
Isoleucyl-tRNA synthetase	Q8ZRZ0	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
isoleucyl-tRNA synthetase, cytoplasmic	P41252	S01.010	granzyme B (Homo sapiens-type)	2
		S01.151	trypsin 1	14
isoleucyl-tRNA synthetase, mitochondrial precursor	Q9NSE4	S01.131	elastase-2	1
		S01.151	trypsin 1	1
Isopentenyl-diphosphate Delta-isomerase	Q8ZM82	M24.001	methionyl aminopeptidase 1 (Escherichia-type)	1
Isopentenyl-diphosphate delta-isomerase	Q9YB30	M04.001	thermolysin	1
Isopentenyl-diphosphate Delta-isomerase 1	Q13907	C01.034	cathepsin S	1
		C01.036	cathepsin K	2
isopentenyl-diphosphate Delta-isomerase 1		S01.151	trypsin 1	5
Isopentenyl-diphosphate delta-isomerase 2	Q9BXS1	C01.036	cathepsin K	1
isopentenyl-diphosphate Delta-isomerase II, chloroplastic	Q42553	M24.A14	LCP55 (Arabidopsis thaliana)	1
isopullulanase	O00105	S26.010	signalase (animal) 21 kDa component	1
Isovaleryl-CoA dehydrogenase, mitochondrial	P26440	S01.269	glutamyl endopeptidase I	1
IST1 homolog	P53990	C13.004	legumain, animal-type	3
		C14.005	caspase-6	1
		S01.010	granzyme B (Homo sapiens-type)	1
		S01.151	trypsin 1	2
	Q9CX00	A01.009	cathepsin D	1
		A01.010	cathepsin E	1
		S01.010	granzyme B (Homo sapiens-type)	1
		S01.151	trypsin 1	1
ITGB2 integrin, beta 2 precursor	P05107	C01.013	cathepsin X	4
ITGB4	P16144	M10.008	matrix metallopeptidase-7	1
ITPase	Q5NT82	M10.003	matrix metallopeptidase-2	1
		S01.269	glutamyl endopeptidase I	1
Itsn1 intersectin 1 isoform 1	Q9Z0R4	S01.136	granzyme B, rodent-type	1