1XFD:
reference: Structure of a human A-type potassium channel interacting protein DPPX, a member of the dipeptidyl aminopeptidase family., Strop P, Bankovich AJ, Hansen KC, Garcia KC, Brunger AT, J Mol Biol 2004 Oct 29;343(4):1055-65. PMID: 15476821

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