Isoelectrofocusing in the Study of the Bf System: Existence of Two Common Subtypes of the BfFAllele

Abstract
The inherited polymorphism of the properdin factor B (Bf system) was studied by isoelectrofocusing in polyacrylamide gel (PAGIF, pH range 5.0-8.0), followed by immunofixation. Using the described technique, 2 different subtypes of F bands are visible (designated as F'' and F''''). Studies of 13 families and 48 mother-child pairs are not in contradiction to the assumption of a codominant inheritance by 2 alleles (BfF'' and BfF'''') at a single locus.