1YFC:
reference: Three-dimensional solution structure of Saccharomyces cerevisiae reduced iso-1-cytochrome c., Baistrocchi P, Banci L, Bertini I, Turano P, Bren KL, Gray HB, Biochemistry 1996 Oct 29;35(43):13788-96. PMID: 8901521

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