2CCY:
reference: Structure of ferricytochrome c' from Rhodospirillum molischianum at 1.67 A resolution., Finzel BC, Weber PC, Hardman KD, Salemme FR, J Mol Biol 1985 Dec 5;186(3):627-43. PMID: 3005592

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