1PFD:
reference: The solution structure of parsley [2Fe-2S]ferredoxin., Im SC, Liu G, Luchinat C, Sykes AG, Bertini I, Eur J Biochem 1998 Dec 1;258(2):465-77. PMID: 9874213

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