Article
The O2 allele: questioning the phenotypic definition of an ABO allele.
Immunohematology - 1 Jan 2008
Yazer M H, Olsson M L
Abstract excerpt
There are three main alleles in the ABO blood group system, A, B, and O. The former two alleles encode glycosyltransferases resulting in the wild-type A and B phenotypes, whereas the latter allele does not encode a functional enzyme owing to a frameshift polymorphism in the majority of cases. Thus the group O phenotype is the absence of A or B sugars. More than 15 years ago the O2 allele was described; this...
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