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  • Title: Isolation and chemical study of the glycosaminoglycans from squid cornea.
    Author: Karamanos NK, Manouras A, Tsegenidis T, Antonopoulos CA.
    Journal: Int J Biochem; 1991; 23(1):67-72. PubMed ID: 1902424.
    Abstract:
    1. Oversulphated chondroitin sulphate (ca 93% of tissue glycosaminoglycans) with average molecular weight 72,500, chondroitin sulphate (5%) and small amounts of lowsulphated chondroitin sulphate were isolated from squid cornea. 2. The sulphation pattern of oversulphated chondroitin sulphate was delta di-4S (52%), delta di-diSD (28%), delta di-6S (9%) and delta di-OSCS (11%) and that of chondroitin sulphate 49, 1, 20 and 30% respectively. 3. All glycosaminoglycans contained neutral monosaccharides, glucose being the predominant neutral monosaccharide in oversulphated chondroitin sulphate and chondroitin sulphate and fucose in low-sulphated chondroitin sulphate. 4. Although L-iduronic acid was not detected, the digestion of oversulphated chondroitin sulphate with chondroitinases ABC and AC gave unexpected results.
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