Abstract
Summary
Highly soluble, acidic, carbohydrate-rich proteins have been isolated from the serum of 6 animal species by a fractionation procedure employing ammonium sulfate. All of the preparations contained large amounts of hexose, hexosamine, and “sialic acid,” and were not coagulated by heat. The major component of each preparation had an isoelectric point below pH 4.5, and resembled the orosomucoid isolated from human serum. Differences in chemical composition and in electrophoretic mobility were observed in preparations from different species.
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