[Identification of subtypes of the Bf system: distribution in a random sample from the population of Berlin (GDR)]

Using isoelectrofocusing in polyacrylamide gel (pH range 5.0-8.0) for the classification of Bf types two different subtypes of F bands are visible. The extended polymorphism is composed of six common phenotypes (Bf F', F'F", F", F'S, F"S, and S). The distribution of Bf subtypes was studied in the population (n = 584) from Berlin (GDR). The allele frequencies observed were: BfF' = 0.0916, BfF" = 0.0753, BfS = 0.8202, BfF1 = 0.0060, BfS0.7 = 0.0043, BfS0.3 = 0.0009, BfSvar(new) = 0.0017.