The formation of alanine and of a-aminobutyric acid confirms the postulated mode of linkage and the mechanism of its cleavage in alkali. The similarity of the action of alkali on cartilage
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چکیده
material remaining after dialysis was lyophilized and then hydrogenated with 10% platinum on Darco. After hydrolysis and analysis for amino acids, the yields of alanine and of craminobutyric acid were found to be at least 20 and 35% of the theoretical values, respectively. Keratosulfate from shark cartilage was allowed t’o react with alkali in the presence of Adams catalyst (5) and hydrogen. At least 50% of the theoretical yields of alanine and cu-aminobutyric acid were obtained. The formation of alanine and of a-aminobutyric acid confirms the postulated mode of linkage and the mechanism of its cleavage in alkali. The similarity of the action of alkali on cartilage keratosulfate and some glycoproteins further underlines the previously indicated similarity of this type of keratosulfate with the blood group substances (6).
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