1ABB:
reference: Control of phosphorylase b conformation by a modified cofactor: crystallographic studies on R-state glycogen phosphorylase reconstituted with pyridoxal 5'-diphosphate., Leonidas DD, Oikonomakos NG, Papageorgiou AC, Acharya KR, Barford D, Johnson LN, Protein Sci 1992 Sep;1(9):1112-22. PMID: 1304390

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