Abstract
Seven cases of an abnormality in bovine transferrins are described. In this abnormality the two fastest strong protein bands apparently have the same mobility as the two slow bands. It has been seen in Tfa2, Tfd1, and Tfd2 transferrins. The characteristic which has only been found in the Hereford breed could be explained by a recessive epistatic gene affecting the sialic acid binding to the two faster strong protein bands of the four controlled by each Ifallele.
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