1K2O:
reference: Probing the open state of cytochrome P450cam with ruthenium-linker substrates., Dunn AR, Dmochowski IJ, Bilwes AM, Gray HB, Crane BR, Proc Natl Acad Sci U S A 2001 Oct 23;98(22):12420-5. PMID: 11606730

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