1CKV:
reference: Structure of the soluble methane monooxygenase regulatory protein B., Walters KJ, Gassner GT, Lippard SJ, Wagner G, Proc Natl Acad Sci U S A 1999 Jul 6;96(14):7877-82. PMID: 10393915

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