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Saha, N. et al.

Glucose dehydrogenase polymorphism among ethnic groups of Singapore--with report of two additional alleles (GDH4 and GDH5).

Placental glucose dehydrogenase ( GDH; E.C.1.1.1.47) polymorphism was studied in 254 Chinese, 104 Malays, and 47 Indians from Singapore using isoelectric focusing. There is suggestive evidence of two additional anodal alleles (GDH4 and GDH5) in addition to the three alleles described in earlier studies. Altogether, 14 phenotypes have been observed in the present investigation, compared with six phenotypes described in earlier studies. It appears that placental GDH is controlled by five codominant autosomal alleles producing 15 possible phenotypes. The gene frequencies of GDH1, GDH2, and GDH3 in these ethnic groups are significantly different from those reported in Caucasians. There were slight differences in the gene frequencies between the three ethnic groups, with those of Indians being nearer to the frequency in Caucasians. In general, the distribution of GDH phenotypes was at Hardy-Weinberg equilibrium in all three ethnic groups studied.[1]

References

Glucose dehydrogenase polymorphism among ethnic groups of Singapore--with report of two additional alleles (GDH4 and GDH5). Saha, N., Bhattacharyya, S.P., Yeoh, S.C., Chua, S.P., Ratnam, S.S. Am. J. Hum. Genet. (1987) [Pubmed]

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