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• W2009131502 abstract "1. Heparan sulphate from bovine lung was fractionated with cetylpyridinium chloride. Solubilisation of complexes was accomplished by increasing concentrations of NaCl in a step-wise manner. Fractions I-IV, which were low-sulphated, contained more D-glucuronic acid than L-iduronic acid, fraction V contained equal proportions while fraction VI was L-iduronic acid-rich. 2. Gel chromatography of heparan sulphates II-IV in 0.5 M sodium acetate yielded extremely asymmetric profiles, while fractions V, VI and heparin did not. 3. Heparan sulphate IV was separated into aggregatable and non-aggregatable species by gel chromatography in 0.5 M sodium acetate. The particle/molecular weights of the two species were determined by light scattering. In 0.15 M NaCl or KCl the aggregatable chains yielded particle weights of 60 000-100 000 while the molecular weight was 20 000 (in 4.0 M guanidine HCl). Non-aggregatable chains afforded 'monomeric' values in 0.15 M NaCl or KCl. 4. Periodate oxidation of D-glucuronic acid residues in N-acetylated block regions followed by scission in alkali was used to fragment aggregating and non-aggregating heparan sulphate IV. The former chains yielded, on average, shorter oligosaccharides than did the latter. Reoxidation of the remaining D-glucuronic acid residues (adjacent to N-sulphated amino sugars) in the oligosaccharides followed by alkaline cleavage resulted in distinctly different fragmentation patterns in the two cases. The iduronate-containing oligosaccharides derived from aggregatable chains were markedly degraded into fragments ranging from glucosamine-L-iduronic acid-glucosamine-(C-3 fragment) to higher saccharides. Only higher saccharides were obtained from fragments of non-aggregatable chains. 5. It is concluded that self-associating heparan sulphates comprise both D-glucuronic acid- and L-iduronic acid-containing repeating units and that these units are arranged in an alternating or mixed fashion. These characteristics are analogous to those observed with self-associating dermatan sulphate species (Fransson, L.-A. and Cöster, L. (1979) Biochim. Biophys. Acta 582, 132-144)." @default.
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• W2009131502 title "Interaction between heparan sulphate chains I. A gel chromatographic, light-scattering and structural study of aggregating and non-aggregating chains" @default.
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• W2009131502 doi "https://doi.org/10.1016/0304-4165(80)90433-x" @default.
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