_EC 3.5.3.- In linear amidines. 139 PDB entries  
EC 3.-.-.- Hydrolases. [19,780 PDB entries]
EC 3.5.-.- Acting on carbon-nitrogen bonds, other than peptide bonds. [1,482 PDB entries]
EC 3.5.3.- In linear amidines. [139 PDB entries]    
EC 3.5.3.1 Arginase. [85 PDB entries]
EC 3.5.3.2 Guanidinoacetase. [-]
EC 3.5.3.3 Creatinase. [1 PDB entries]
EC 3.5.3.4 Allantoicase. [2 PDB entries]
EC 3.5.3.5 Formimidoylaspartate deiminase. [-]
EC 3.5.3.6 Arginine deiminase. [7 PDB entries]
EC 3.5.3.7 Guanidinobutyrase. [-]
EC 3.5.3.8 Formimidoylglutamase. [2 PDB entries]
EC 3.5.3.9 Allantoate deiminase. [-]
EC 3.5.3.10 D-arginase. [-]
EC 3.5.3.11 Agmatinase. [2 PDB entries]
EC 3.5.3.12 Agmatine deiminase. [7 PDB entries]
EC 3.5.3.13 Formimidoylglutamate deiminase. [-]
EC 3.5.3.14 Amidinoaspartase. [-]
EC 3.5.3.15 Protein-arginine deiminase. [12 PDB entries]
EC 3.5.3.16 Methylguanidinase. [-]
EC 3.5.3.17 Guanidinopropionase. [-]
EC 3.5.3.18 Dimethylargininase. [16 PDB entries]
EC 3.5.3.19 Transferred entry: 3.5.1.116. [-]
EC 3.5.3.20 Diguanidinobutanase. [-]
EC 3.5.3.21 Methylenediurea deaminase. [-]
EC 3.5.3.22 Proclavaminate amidinohydrolase. [2 PDB entries]
EC 3.5.3.23 N-succinylarginine dihydrolase. [3 PDB entries]
EC 3.5.3.24 N(1)-aminopropylagmatine ureohydrolase. [-]
EC 3.5.3.25 N(omega)-hydroxy-L-arginine amidinohydrolase. [-]
EC 3.5.3.26 (S)-ureidoglycine aminohydrolase. [-]

[-] signifies that there are no PDB entries for the given enzyme subclass