1QL4:
reference: Structure of the soluble domain of cytochrome c(552) from Paracoccus denitrificans in the oxidized and reduced states., Harrenga A, Reincke B, Ruterjans H, Ludwig B, Michel H, J Mol Biol 2000 Jan 21;295(3):667-78. PMID: 10623555

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