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In the present work, a new method of purification for antithrombin was developed using an expanded bed chromatography technique. Milk fat was removed by centrifugation and caseins were precipitated selectively by addition of zinc chloride. Crude skim milk was then directly fed to an expanded bed column containing the ion-exchange matrix. The use of a cation-exchanger (P-11) resulted in 100% adsorption...
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