Identification of F13A*7 as a Population Specific Marker
Factor XIII(F13), a precursor of fibrinoligase, is a tetramer with 2A and 2B subunits. F13B functions as a carrier and regulator of the enzymatically active F13A subunit. The two most common alleles are F13A*1 and F13A*2 with all other alleles appearing as rare or uncommon in most population groups reported in the 1iterature. (Board, 1979; Olaissen et al., 1983; Dykes et al., 1986). Ten different genetic variants of F13A have been reported using isoelectric focusing (IEF) techniques (Dykes et al, 1988). F13A can only be detectable in plasma samples, therefore it cannot be used in blood stain analysis. In parentage testing the exclusion probability of F13A=0.15. For this study we tested F13A on Whites and Blacks using IEF separation detected by immunoblotting. This report identifies the allele F13A*7 to be more specific for Black populations.
KeywordsRare Variant Parentage Testing Exclusion Probability Wash Membrane Gene Frequency Distribution
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