blood group antigens
The set of cell surface antigens found chiefly, but not solely, on blood cells. More than fifteen different blood group systems are recognized in humans. There may be naturally occurring antibodies without immunization, especially in the case of the ABO system, and matching blood groups is important for safe transfusion. In most cases the antigenic determinant resides in the carbohydrate chains of membrane glycoproteins or glycolipids. See also Rhesus, Duffy, Kell, Lewis and MN blood groups.

Dictionary of molecular biology. 2004.

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  • blood group antigens — the antigens responsible for specificities of blood groups; those of the ABO and Lewis blood groups were the first to be characterized. They are formed by sequential addition of monosaccharide moieties to any of several different types of… …   Medical dictionary

  • MN blood group antigens — A pair of blood group antigens governed by genes that segregate independently of the ABO locus. The alleles are co dominant and there are three types MM, NN, and MN. Glycophorin has M or N activity and this is associated with oligosaccharides… …   Dictionary of molecular biology

  • blood group — Med. any of various classes into which human blood can be divided according to immunological compatibility, based on the presence or absence of specific antigens on red blood cells. Also called blood type. Cf. ABO system, Rh factor. [1915 20] * * …   Universalium

  • blood group — blood′ group n. med any of various classes into which human blood can be divided according to immunological compatibility based on the presence or absence of specific antigens on red blood cells Also called blood type Compare ABO system Rh factor …   From formal English to slang

  • Blood group — An inherited feature on the surface of the red blood cells. A series of related blood types constitute a blood group system such as the Rh or the ABO system. The frequencies of the ABO and Rh blood types vary from population to population. In the …   Medical dictionary

  • blood group — noun human blood cells (usually just the red blood cells) that have the same antigens • Syn: ↑blood type • Hypernyms: ↑blood • Hyponyms: ↑A, ↑type A, ↑group A, ↑B, ↑ …   Useful english dictionary

  • blood group — any one of the many types into which a person s blood may be classified, based on the presence or absence of certain inherited antigens on the surface of the red blood cells. Blood of one group contains antibodies in the serum that react against… …   The new mediacal dictionary

  • blood group — /ˈblʌd grup / (say blud groohp) noun one of several classifications into which the blood may be grouped according to its clotting reactions, the commonest being A (A antigens in the blood), B (B antigens in the blood), AB (both A and B antigens… …   Australian English dictionary

  • blood group —    An immunologically distinct, genetically determined class of human erythrocyte antigens, identified as A, B, AB, and O. A classification of red blood cell surface antigens, for example ABO …   Forensic science glossary

  • blood group — noun Date: 1916 one of the classes (as those designated A, B, AB, or O) into which individuals or their blood can be separated on the basis of the presence or absence of specific antigens in the blood called also blood type …   New Collegiate Dictionary

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