1WAD: Cytochrome C3 With 4 Heme Groups And One Calcium Ion
reference: Cytochrome c3 from Desulfovibrio gigas: crystal structure at 1.8 A resolution and evidence for a specific calcium-binding site., Matias PM, Morais J, Coelho R, Carrondo MA, Wilson K, Dauter Z, Sieker L, Protein Sci 1996 Jul;5(7):1342-54. PMID: 8819167

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