The crystal structures of these enzymes were collected from PDB, with the names and their PDB code as follows: CYP 1A1 (PDB code: 4I8V), CYP 1A2 (PDB code: 2HI4), CYP 1B1 (PDB code: 3PM0), CYP 2A6 (PD... code: 1Z10), CYP 2A13 (PDB code: 2PB5), CYP 2B4 (PDB code: 3TMZ), CYP 2B6 (PDB code: 3UA5), CYP 2C5 (PDB code: 1NR6), CYP 2C8 (PDB code: 2VN0), CYP 2C9 (PDB code: 1R9O), CYP 2C18 (PDB code: 2H6P), CYP 2C19 (PDB code: 4GQS), CYP 2D6 (PDB code: 3TDA), CYP 2E1 (PDB code: 3T3Z), and CYP 3A4 (PDB code: 3NXU).