Abstract
A chondroitinase that degrades only chondroitin sulfate B was isolated from F.heparinum previously grown in the presence of chondroitin sulfates A, B or C. The chondroitinase B was separated from a constitutional chondroitinase AC also present in F.heparinum extracts. This enzyme acts only upon chondroitin sulfate B, producing oligo- and tetra- saccharides plus an unsaturated 4-sulfated disaccharide (Δ Di-4S). The oligosaccharide is in turn susceptible only to the chondroitinase AC, producing (Δ Di-4S) and other products. The action of these two enzymes confirms the hybrid nature of chondroitin sulfate B.
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