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  • Title: Chondroitinase-resistant sulfated glycosaminoglycans synthesized by cartilages of chick embryos and of newborn chickens and rats.
    Author: Sobue M, Takeuchi J.
    Journal: Calcif Tissue Int; 1979 Jul 03; 27(3):269-73. PubMed ID: 114289.
    Abstract:
    Biosynthesis of chondroitinase-resistant glycosaminoglycans as minor components was studied in the cartilages of chick embryos and of newborn chickens and rats. Sternal and knee cartilages were labeled in vitro with 35SO42-, and then 35S-labeled glycosaminoglycans were analyzed. In rats up to 2 weeks old, only one glycosaminoglycan could be detected as heparan sulfate. In the chick embryos and the newborn chickens, however, keratan sulfate as well as heparan sulfate could be detected. As chondroitinase-sensitive glycosaminoglycans, large amounts of both chrondroitin 4- and 6-sulfates were synthesized in the chick cartilage, but the synthesis of chondroitin 6-sulfate could scarcely be seen in the rat cartilage. The results seem to indicate that the biosynthesis of keratan sulfate has some relation to that of chondroitin 6-sulfate.
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