1LL2:
reference: Crystal structure of the autocatalytic initiator of glycogen biosynthesis, glycogenin., Gibbons BJ, Roach PJ, Hurley TD, J Mol Biol 2002 May 31;319(2):463-77. PMID: 12051921

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