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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

The largest isoform of platelet membrane glycoprotein Ib alpha is commonly distributed in eastern Asian populations.

Platelet membrane glycoprotein Ib alpha has at least two polymorphisms which affect phenotype. One is the dimorphism at codon 145, and the other is a molecular weight polymorphism due to variable numbers of tandem repeats (TR) in the macroglycopeptide region. These two polymorphisms are in linkage disequilibrium. The frequencies of these polymorphisms differ considerably depending on race, and the largest variant with four TR is almost exclusively present in the Japanese population. We examined the genotypes of HPA-2 and TR polymorphism in three different races from Eastern Asia; the Japanese (n = 103), Korean (n = 101) and Chinese population (n = 177). The gene frequency of HPA-2 differed significantly among these three populations. Among HPA-2b-positive individuals, the A isoform with four TR and B with three TR were present in all three populations and A dominated over B. Individuals homozygous for the A isoform were found in both Japanese and Korean populations. These findings indicate that the largest haplotype is common in the Eastern Asian region.[1]

References

  1. The largest isoform of platelet membrane glycoprotein Ib alpha is commonly distributed in eastern Asian populations. Ishida, F., Furihata, K., Ishida, K., Kodaira, H., Han, K.S., Liu, D.Z., Kitano, K., Kiyosawa, K. Thromb. Haemost. (1996) [Pubmed]
 
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