title: Properdin factor B (Bf) polymorphism in Saudi Arabs. High frequency of a 'rare' allele BfS0.7.
abstract: The distribution of properdin factor B (Bf) phenotypes and the gene frequencies were investigated in 918 Saudi Arabs. A high frequency of the 'rare' allele BFS0.7 was observed BfS0.7 = 0.1514). The frequencies of the common Bf alleles (BfS = 0.5174, BfF = 0.3213) are outside the corresponding ranges of BfS, BfF gene frequencies found in European Caucasoids.
mesh_terms: D000483:Alleles; D011415:Complement Factor B / Q000235:genetics*; D004792:Enzyme Precursors / Q000235:genetics*; D005006:Ethnicity; D005260:Female; D005787:Gene Frequency; D006801:Humans; D008297:Male; D011110:Polymorphism, Genetic; D011247:Pregnancy; D012529:Saudi Arabia
chemical_list: D004792:Enzyme Precursors; D011415:Complement Factor B