4EVF:
reference: Alpha-1 giardin is an annexin with highly unusual calcium-regulated mechanisms., Weeratunga SK, Osman A, Hu NJ, Wang CK, Mason L, Svard S, Hope G, Jones MK, Hofmann A, J Mol Biol. 2012 Oct 19;423(2):169-81. doi: 10.1016/j.jmb.2012.06.041. Epub 2012 , Jul 10. PMID: 22796298

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