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The levels of arylsulfatases A, B, and C, heparan N-sulfatase, N-acetylgalactosamine-6-sulfate sulfatase, and iduronate-2-sulfate sulfatase were all markedly decreased in cultured skin fibroblasts. Screening tests for mucopolysacchariduria were consistently negative; however, thin-layer chromatographic analysis of isolated urinary glycosaminoglycans showed increased amounts of heparan sulfate. 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