1A1M:
reference: Bound water structure and polymorphic amino acids act together to allow the binding of different peptides to MHC class I HLA-B53., Smith KJ, Reid SW, Harlos K, McMichael AJ, Stuart DI, Bell JI, Jones EY, Immunity 1996 Mar;4(3):215-28. PMID: 8624812

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