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  • Title: Isolation and partial characterization of low sulfated chondroitin 4-sulfate-proteoglycan in bovine blood.
    Author: Nakamura H, Nagai Y.
    Journal: Biochim Biophys Acta; 1979 Feb 26; 576(2):361-71. PubMed ID: 427193.
    Abstract:
    Bovine plasma low sulfated chondroitin sulfate-proteoglycan (34 microgram/ml plasma), accounting for the main component of acidic glycosaminoglycans in blood, has been purified by isoelectric precipitation, dissociation with 4 M guanidine chloride followed by DEAE-chromatography, Sephadex G-200 chromatography and by preparative polyacrylamide gel electrophoresis. The proteoglycan, having a molecular weight of approx. 44,000, is composed of about 77% protein and 23% glycosaminoglycan at a molar ratio of 1 : 1 which could be cleaved by alkaline treatment into each component. Amino acid analysis of the proteoglycan and its glycosylpeptide has shown that the material is derived from a different origin from other tissue proteoglycans, though the amino acid residues surrounding O-glycosidic linkage to serine residue are quite similar to that of cartilage proteoglycan. Characteristic features of plasma low sulfate chondroitin sulfate-proteoglycan are discussed, compared with tissue materials.
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