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date: 06 August 2020

ABO blood group system 

A Dictionary of Biomedicine

John Lackie

, Brian NationBrian Nation

The first of the blood group systems to be discovered. The H-locus, which encodes a fucosyl transferase, determines whether the H-antigen, a glycosyl chain attached to ceramide or protein, will be expressed on the erythrocyte surface (in the rare Bombay phenotype it is not expressed). If the H-antigen is expressed then the product of the A allele of the ABO locus, a glycosyltransferase, can add ... ...

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