PREPARATION AND PROPERTIES OF RAT TRANSFERRIN

Abstract
A method for the isola-tion of transferrin from rat serum depending only on electrophoresis and ion-exchange chromatography is described. The two types of transferrin present in the serum are separable not only by electrophoresis in starch gel but also by chromatography on diethylamino-ethyl-Sephadex. After the removal of sialic acid with neuraminidase the mobility difference is retained. Results on the molecular weights, absorption spectra, iron contents and amino acid compositions of the two proteins are given.