1CDN:
reference: Solution structure of (Cd2+)1-calbindin D9k reveals details of the stepwise structural changes along the Apo-->(Ca2+)II1-->(Ca2+)I,II2 binding pathway., Akke M, Forsen S, Chazin WJ, J Mol Biol 1995 Sep 8;252(1):102-21. PMID: 7666423

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