PR:000001818 MHC class I histocompatibility antigen alpha chain MHCcIalpha has_part Pfam:PF06623 MHC_I C-terminus 20090326 PRO:CNA PR:000001818 MHC class I histocompatibility antigen alpha chain MHCcIalpha has_part Pfam:PF00129 Class I Histocompatibility antigen, domains alpha 1 and 2 20090326 PRO:CNA PR:000001818 MHC class I histocompatibility antigen alpha chain MHCcIalpha has_part Pfam:PF07654 Immunoglobulin C1-set domain 20090326 PRO:CNA