1BEB:
reference: Bovine beta-lactoglobulin at 1.8 A resolution--still an enigmatic lipocalin., Brownlow S, Morais Cabral JH, Cooper R, Flower DR, Yewdall SJ, Polikarpov I, North AC, Sawyer L, Structure 1997 Apr 15;5(4):481-95. PMID: 9115437

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