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

Genetic studies on the Senegal population. II. Polymorphisms of the plasma proteins F13A, F13B, ORM1, AHSG, C6, C7, and APOC2.

Using isoelectric focusing and immunoblotting techniques, we tested 270 plasma samples from 3 populations of Senegal (Wolof, Peul, Tukulor) to determine genetic variation at 7 protein loci (F13A, F13B, ORM1, AHSG, C6, C7, APOC2). Four of the seven systems (F13A, ORM1, AHSG, C6) have not been studied previously in sub-Saharan Africa, and one system (C7) has never been examined in any population of African ancestry. The assumption that F13B*6, F13B*23, and APOC2*2 represent African marker alleles is supported by this study. At the AHSG locus we observed a four-allele polymorphism rather than the two-allele polymorphism commonly seen in other ethnic groups. At the C6 locus, in addition to the two common alleles C6*A and C6*B, we observed three other alleles, one of which (C6*A3), found at polymorphic frequencies, seems to be another example of a unique African allele. The C7 locus was found to be monomorphic in the Peul but polymorphic in the Wolof and the Tukulor. At the F13A and ORM1 loci, Senegalese have allele frequencies similar to those reported for American blacks. All three Senegalese samples display typical African features, such as a high frequency of the F13B*2 allele and the presence of the APOC2*2 allele at a polymorphic level. However, some differences in allele frequencies have been found between the three groups, and this could have implications for reconstructing their remote history.(ABSTRACT TRUNCATED AT 250 WORDS)[1]


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