Blood groups in humans are characterized by erythrocyte (red blood cell) antigens with common immunologic properties. Blood group systems are series of such antigens encoded by a single gene or by a cluster of 2 or 3 closely linked homologous genes.1
The International Society of Blood Transfusion (ISBT) recognizes 346 antigen specificities and 36 blood group systems....
The Granulocyte Antigen Working Party of the ISBT has formulated rules for well-defined human neutrophil antigens,26 as presented in Table 14.1-5, although at this writing they have not met with universal acceptance.6
See 14.8.6, Immunoglobulins, for Fc receptor terminology and ...
The current system of human platelet antigen (HPA) nomenclature, adopted in 1990, is overseen by the Platelet Nomenclature Committee of the ISBT and the International Society on Thrombosis and Haemostasis.23
24 As with blood groups, there are platelet antigen systems and specific antigens within those systems. The HPA nomenclature pertains to “all protein alloantigens expressed on the platelet membrane, except those coded by genes of the major histocompatibility complex (MHC)”...