Ion-exchange chromatography was used to further purify a human pituitary fraction rich in thyrotrophic and luteinizing hormone activities. Approximately twofold concentration of both activities was obtained by chromatography on IRC-50 at pH 7·5, but the hormones were not separated. Subsequent chromatography on DEAE-cellulose at pH 9·5 led to a tenfold concentration of the luteinizing hormone in a fraction practically free of thyrotrophic activity and to a fourfold concentration of the thyrotrophic hormone in a fraction still exhibiting substantial luteinizing hormone activity.
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Online ISSN: 1479-6805
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