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After alkaline hydrolysis, the carbohydrate from soluble collagen of guinea pig skin may be largely accounted for as glycosides in which carbon 1 of the disaccharide, glucosyl-galactose, or of galactose, is attached to the δ-hydroxyl group of hydroxylysine. Identical compounds have also been isolated directly from normal human urine. These findings confirm the presence of disaccharide side chains in collagen.
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Cunningham et al. (1967) studied this question.
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