2QLL:
reference: Molecular recognition of the protein phosphatase 1 glycogen targeting subunit by glycogen phosphorylase., Pautsch A, Stadler N, Wissdorf O, Langkopf E, Moreth W, Streicher R, J Biol Chem. 2008 Apr 4;283(14):8913-8. Epub 2008 Jan 15. PMID: 18198182

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