4MU8:
reference: Structure of a mitochondrial cytochrome c conformer competent for peroxidase activity., McClelland LJ, Mou TC, Jeakins-Cooley ME, Sprang SR, Bowler BE, Proc Natl Acad Sci U S A. 2014 May 6;111(18):6648-53. doi:, 10.1073/pnas.1323828111. Epub 2014 Apr 23. PMID: 24760830

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