4MSP:
reference: Structure of human peptidyl-prolyl cis-trans isomerase FKBP22 containing two EF-hand motifs., Boudko SP, Ishikawa Y, Nix J, Chapman MS, Bachinger HP, Protein Sci. 2014 Jan;23(1):67-75. doi: 10.1002/pro.2391. Epub 2013 Nov 25. PMID: 24272907

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