1A6A:
reference: The structure of an intermediate in class II MHC maturation: CLIP bound to HLA-DR3., Ghosh P, Amaya M, Mellins E, Wiley DC, Nature 1995 Nov 30;378(6556):457-62. PMID: 7477400

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