Figure 5: Structure of genes and proteins. a) human arginase I (ARG I; Gene ID: NM_001244438.1; PDB ID: 3TF3); b) human arginase II (ARG II; Gene ID: NM_001172.3; PDB ID: 3PQ3); c) human ornithine amino transferase (OAT; Gene ID: NM_001171814.1; PDB ID: 1GBN); d) human ornithine decarboxylase (ODC; Gene ID: NM_002539.1; PDB ID: 1D7K); e) human neuronal nitric oxide synthase (nNOS; Gene ID: NM_000620.4; PDB ID: 1ZVL (rat)) f) inducible nitric oxide synthase (iNOS; Gene ID: NM_000625.4; PDB ID: 3HR4); g) endothelial nitric oxide synthase (ecNOS; Gene ID: NM_000603.4;PDB ID: 3EAH).