Red Cell Immunogenetics and Blood Group Terminology
Understanding Blood Group Antigens: Discover the role of Red Blood Cell (RBC) surface antigens and their diverse functions. Explore how antibodies define these antigens and how they determine an individual’s blood group. Blood group systems are defined by genetics and the International Society of Blood Transfusion (ISBT) maintains the official record of these systems, encompassing 44 systems and 354 antigens as of December 2022.
Antigen Categories by ISBT: Learn about ISBT’s classification for unlinked antigens. The ‘Collections’ (200 series) group similar antigens with unknown genetic basis. Explore the ‘700 Series’ for rare antigens (<1% incidence) and the ‘901 Series’ for high incidence antigens (>90%), both not fitting standard systems or collections.