title: Polymorphism of the HL-A system.
mesh_terms: D000936:Antigen-Antibody Complex; D000937:Antigen-Antibody Reactions; D003429:Cross Reactions; D000939:Epitopes; D006648:Histocompatibility; D006801:Humans; D007106:Immune Sera; D007125:Immunogenetics; D011110:Polymorphism, Genetic; D014181:Transplantation Immunology
chemical_list: D000936:Antigen-Antibody Complex; D000939:Epitopes; D007106:Immune Sera