Genetic polymorphism of the serum a-protease inhibitor (PI) and group-
specific component (GC) in minks was revealed using one-dimensional po
lyacrylamide gel electrophoresis and immunoblotting. Two codominant al
leles were identified at each of the two loci. The data ruled out the
possibility of any linkage between the PI, GC and the coat colour gene
Crystal (Cr).