Seromucoid and the bound carbohydrate of the serum proteins

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Abstract
Seromucoid, the carbohydrate-rich, non-coagulable protein of serum was investigated, and an improved method for its isolation worked out, leading to a main fraction of uniform properties. This contains 10.7% of carbohydrate, consisting of N-acetylglucosamine, galactose and mannose in equimolecular proportions, and also approximately 3% tyrosine, 1% tryptophan and 2.3% cystine. The specific rotation ([[alpha]]5461 [long dash]54[degree]) is lower than that of serum albumin. Methods are described for the detn. of non-amino sugars and glucosamine in proteins. The ratio of Hexose/glucosamine was found to be 2/1 for all fractions examined.