| S01.001: chymotrypsin A (cattle-type) 2GMT |
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| S01.010: granzyme B (Homo sapiens-type) 1IAU |
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| S01.015: tryptase beta 1A0L |
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| S01.017: kallikrein-related peptidase 5 2PSY |
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| S01.021: DESC1 peptidase 2OQ5 |
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| S01.023: flavoxobin 1OP0_A |
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| S01.035: brachyurin-T 2F91_B |
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| S01.091: natural killer cell peptidase 1 (Rattus norvegicus) 1FI8_A |
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| S01.094: trypsin 1 (Rattus-type) 1BRA |
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| S01.101: trypsin (Streptomyces griseus-type) 1SGT |
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| S01.103: trypsin (fungal) 1TRY |
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| S01.109: astrovirus serine peptidase 2W5E_A |
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| S01.119: trypsin-2 type C 1DPO |
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| S01.121: hypodermin C 1HYL |
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| S01.122: brachyurin-C 1AZZ_A |
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| S01.126: trypsin-3 (fish) 1A0J |
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| S01.127: cationic trypsin (Homo sapiens-type) 1TRN |
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| S01.131: elastase-2 1HNE |
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| S01.133: cathepsin G 1CGH |
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| S01.134: myeloblastin 1FUJ |
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| S01.135: granzyme A 1ORF |
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| S01.137: granzyme C 3FZZ |
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| S01.139: granzyme M 2ZGC_A |
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| S01.141: mast cell peptidase 1 (Rattus-type) 3RP2 |
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| S01.143: tryptase alpha 2F9P |
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| S01.146: granzyme K 1MZA |
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| S01.150: mast cell peptidase 5 (mouse numbering) 2RDL_A |
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| S01.151: trypsin 1 1JRS |
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| S01.152: chymotrypsin B 2JET_A |
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| S01.153: elastase-1 1ELC |
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| S01.156: enteropeptidase 1EKB |
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| S01.157: chymotrypsin C 1PYT_C |
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| S01.159: prostasin 3DFJ |
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| S01.162: kallikrein-related peptidase 3 2ZCH_P |
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| S01.170: kallikrein 1-related peptidase b3 1SGF_G |
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| S01.171: kallikrein 1 (Equus caballus) 1GVZ |
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| S01.172: kallikrein 1-related peptidase c2 (Rattus norvegicus) 1TON |
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| S01.173: kallikrein 13 (Mus musculus) 1AO5 |
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| S01.174: mesotrypsin 2R9P_A |
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| S01.192: complement component activated C1r 1MD7_A |
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| S01.193: complement component activated C1s 1ELV |
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| S01.194: complement component C2a 2ODP |
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| S01.198: mannan-binding lectin-associated serine peptidase 1 3GOV_A |
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| S01.204: prophenoloxidase-activating peptidase-I 2OLG |
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| S01.213: coagulation factor XIa 1ZJD_A |
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| S01.214: coagulation factor IXa 1PFX |
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| S01.215: coagulation factor VIIa 1DAN |
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| S01.216: coagulation factor Xa 1HCG |
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| S01.217: thrombin 1ABJ |
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| S01.218: protein C (activated) 1AUT |
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| S01.223: acrosin 1FIZ |
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| S01.224: hepsin 1O5F_L |
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| S01.228: hepatocyte growth factor activator 1YBW |
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| S01.229: mannan-binding lectin-associated serine peptidase 2 1Q3X |
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| S01.231: urokinase-type plasminogen activator 1LMW |
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| S01.233: plasmin 1BUI_A |
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| S01.236: kallikrein-related peptidase 6 1LO6_A |
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| S01.243: lumbrokinase 1YM0 |
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| S01.244: kallikrein-related peptidase 8 1NPM |
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| S01.251: kallikrein-related peptidase 4 2BDG_A |
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| S01.261: streptogrisin A 1SGC |
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| S01.262: streptogrisin B 1SGP_E |
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| S01.267: streptogrisin E 1HPG |
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| S01.268: alpha-lytic endopeptidase 2ALP |
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| S01.269: glutamyl endopeptidase I 1QY6 |
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| S01.270: exfoliatin A 1EXF |
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| S01.273: DegP peptidase 1KY9_A |
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| S01.275: DegS peptidase 1SOZ |
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| S01.278: HtrA2 peptidase 1LCY_A |
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| S01.280: lysyl endopeptidase (bacteria) 1ARC |
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| S01.282: SplB peptidase (Staphylococcus aureus) 2VID |
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| S01.283: SplC peptidase (Staphylococcus aureus) 2AS9_A |
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| S01.300: kallikrein-related peptidase 7 2QXI_A |
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| S01.302: matriptase 2GV6_A |
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| S01.431: SFase-2 endopeptidase 2SFA |
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| S01.438: fire ant chymotrypsin 1EQ9 |
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| S01.443: glutamyl peptidase BI 1P3E |
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| S01.466: ACC-C peptidase 2AIQ_A |
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| S01.491: HtrA peptidase (Thermotoga maritima-type) 1L1J |
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| S01.502: Grass peptidase (Insecta) 2XXL |
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| S01.931: kallikrein 1-related peptidase b4 (Mus musculus) 1SGF_A |
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| S01.UPE: subfamily S1E unassigned peptidases 2PFE |
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