2ASA:
reference: Homology modeling of cytochrome P450scc and the mutations for optimal amperometric sensor., Sivozhelezov V, Nicolini C, J Theor Biol. 2005 Jun 21;234(4):479-85. PMID: 15808869

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