5XOP:
reference: Crystal structure of calcium binding protein-1 from Entamoeba histolytica: a novel arrangement of EF hand motifs., Kumar S, Padhan N, Alam N, Gourinath S, Proteins. 2007 Sep 1;68(4):990-8. PMID: 17554780

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