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H antigen can refer to one of various types of antigens having diverse biological functions: * Also known as substance H, a precursor to each of the ABO blood group antigens, apparently present in all people except those with the Bombay Blood phenotype (see Hh antigen system) * Histocompatibility antigen, a major factor in graft rejection. Even when Major Histocompatibility Complex genotype is perfectly matched, can cause slow rejection of a graft. * * major H antigens "encode molecules that present foreign peptides to T cells"〔 * * minor H antigens "present polymorphic self peptides to T cells".〔 Includes, e.g. the H-Y antigen * a bacterial flagellar antigen ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「H antigen」の詳細全文を読む スポンサード リンク
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