Disaccharides, acid hydrolysis properties

Chondroitin 4- and 6-sulfates were originally designated as chondroitin sulfate A and C, respectively, and the close similarity in structure between them is demonstrated by the fact that both mucopolysaccharides yield the same disaccharide (chondrosine) on controlled, acidic hydrolysis together with sulfuric and acetic acids. Chondroitin 4-sulfate or chondroitin 6-sulfate, or both, occur in cartilage and adult bone, and the former mucopolysaccharide is a minor constituent of ligamentum nuchae and cornea (M17). Chondroitin 6-sulfate is a minor constituent of umbilical cord and occurs with dermatan sulfate (chondroitin sulfate B) and hyaluronic acid in heart valves and adult connective tissue (M17). An acid mucopolysaccharide isolated from human plasma resembles chondroitin 4-sulfate in its properties (S4). 

Two further degradation products have been obtained from moenomycin A, suggesting that when the part structures (42) and (43), are linked together they form the complete antibiotic. Another report describes the glucose-glucosamine disaccharide present in fragment (42), which was obtained from moenomycin A by acid hydrolysis. Earlier work on the structure and properties of moenomycin A has been reviewed. ... 

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