1CLL: Calmodulin Structure Refined At 1.7 Angstroms Resolution
reference: Calmodulin structure refined at 1.7 A resolution., Chattopadhyaya R, Meador WE, Means AR, Quiocho FA, J Mol Biol 1992 Dec 20;228(4):1177-92. PMID: 1474585

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