2CDV:
reference: Refined structure of cytochrome c3 at 1.8 A resolution., Higuchi Y, Kusunoki M, Matsuura Y, Yasuoka N, Kakudo M, J Mol Biol 1984 Jan 5;172(1):109-39. PMID: 6319712

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