1CCR:
reference: Structure of rice ferricytochrome c at 2.0 A resolution., Ochi H, Hata Y, Tanaka N, Kakudo M, Sakurai T, Aihara S, Morita Y, J Mol Biol 1983 May 25;166(3):407-18. PMID: 6304326

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