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. 1989 Jun;44(6):835–843.

Gene and gene-product variation in the apolipoprotein A-I/C-III/A-IV cluster in the Dogrib Indians of the Northwest Territories.

S A Cole 1, E J Szathmary 1, R E Ferrell 1
PMCID: PMC1715656  PMID: 2499188

Abstract

The Dogrib, an Amerindian tribe residing in the Northwest Territories of Canada, were typed for DNA and protein polymorphism at the apolipoprotein A-I/C-III/A-IV gene cluster. Variation was seen at three previously described RFLPs detected with the enzymes SstI, PstI, and XmnI, though frequencies of these polymorphisms differ significantly from those reported in other populations. They exhibit no variation at two previously reported PvuII sites. No variation was seen in the APO A-I or APO A-IV gene products, with the Dogrib showing the most common isoelectric-focusing/immunoblot patterns of other world populations. Haplotype frequencies computed from inferred haplotypes and by maximum likelihood estimation did not differ significantly. The extent of nonrandom association of these sites is highly significant (P less than .00001), though pairwise analysis shows significance between the SstI and XmnI sites only. Levels of fasting triglyceride and fasting total cholesterol were determined for each individual. Analysis of covariance shows that fasting triglyceride levels in women vary significantly with the XmnI genotype. These results suggest that genetic variation at the APO A-I/C-III/A-IV gene cluster may be a useful tool for the study of quantitative lipoprotein variation in the Dogrib.

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Selected References

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