An unusual transferrin variant in sheep

Abstract
An unusual transferrin variant, Tf Aw, was found in sheep. Its position in starch gel electrophoresis is identical with the variant Tf A, but the intensity of corresponding bands is substantially lower. Family analyses prove that the variant Aw is genetically controlled and represents either the product of an unusual allele Tf Aw or the interaction between the allele Tf A and a hypothetical modifying locus.