ID 3.1.6.9 DE chondro-4-sulfatase. CA 4-deoxy-beta-D-gluc-4-enuronosyl-(1->3)-N-acetyl-D-galactosamine CA 4-sulfate + H2O = 4-deoxy-beta-D-gluc-4-enuronosyl-(1->3)-N-acetyl-D- CA galactosamine + H(+) + sulfate. CC -!- Also acts on the saturated analog but not on higher oligosaccharides, CC nor any 6-sulfates. //