85-7341-69 MHC Class 2, I-Ak (H-2 Class II Histocompatibility Antigen, A-K alpha Chain, H2-Aa, H-2 Class II Histocompatibility Antigen, A-K beta Chain, H2-Ab1) 500ug M3887-53D
85-7341-69 MHC Class 2, I-Ak (H-2 Class II Histocompatibility Antigen, A-K alpha Chain, H2-Aa, H-2 Class II Histocompatibility Antigen, A-K beta Chain, H2-Ab1) 500ug M3887-53D