Enzymatic conversion of human O into A erythrocytes and of B into AB erythrocytes.
D000017:ABO Blood-Group System; D000372:Agglutination Tests; D004912:Erythrocytes / Q000276:immunology*; D006801:Humans; D014166:Transferases / Q000494:pharmacology*
D000017:ABO Blood-Group System; D014166:Transferases