The Mls system.
D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D002874:Chromosome Mapping; D000939:Epitopes; D005815:Genetic Code; D006087:Graft vs Host Reaction; D006648:Histocompatibility; D008198:Lymph Nodes / Q000276:immunology; D007959:Lymphocyte Culture Test, Mixed; D008264:Macrophages / Q000276:immunology; D051379:Mice; D013163:Splenomegaly; D013601:T-Lymphocytes / Q000276:immunology
D000939:Epitopes