Abstract
The fast migrating Gc variant of Australianaborigines, New Guinean indigenes, South African Bantu, andblack Americans, has been compared by immunoelectrophoresis, gel electrophoresis in polyacrylamide and starch, and byantigen-antibody-crossed electrophoresis. No differences weredetectable by immunoelectrophoresis or gel electrophoresisand only slight and probably insignificant differences by antigen-antibody-crossed electrophoresis. It is probable that the fast migrating Gc variant of these four populations represents the same mutation.Introduction