1HCZ:
reference: The heme redox center of chloroplast cytochrome f is linked to a buried five-water chain., Martinez SE, Huang D, Ponomarev M, Cramer WA, Smith JL, Protein Sci 1996 Jun;5(6):1081-92. PMID: 8762139

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).