1K8D:
reference: Promiscuous antigen presentation by the nonclassical MHC Ib Qa-2 is enabled by a shallow, hydrophobic groove and self-stabilized peptide conformation., He X, Tabaczewski P, Ho J, Stroynowski I, Garcia KC, Structure (Camb) 2001 Dec;9(12):1213-24. PMID: 11738047

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