Starch gel electrophoresis at alkaline pH of bovine growth hormone preparations from a number of sources has revealed a common pattern characterized by a major anionic component and two minor faster moving components. Gel filtration studies of the hormone indicate that all three components are of similar molecular weight. A method has been developed for separation of the components by chromatography on diethylaminoethyl Sephadex. All three components were biologically active and displayed similar amino acid compositions.
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Free et al. (1966) studied this question.
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