1BSQ:
reference: Functional implications of structural differences between variants A and B of bovine beta-lactoglobulin., Qin BY, Bewley MC, Creamer LK, Baker EN, Jameson GB, Protein Sci 1999 Jan;8(1):75-83. PMID: 10210185

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