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Sephadex structural components. The drawing shows the structure of dextran B512, a homopolysaccharide consisting of d-glucopyranose mainly linked via α-1,6 linkages (95%) and, to a lesser extent, via α-1,3 linkages (5%) at the branch points. Sephadex is prepared by cross-linking dextran B512 with epichlorohydrin. Isomaltose, isomaltotriose and isomaltotetraose are oligosaccharides consisting of two, three and four residues of d-glucopyranose linked via α-1,6 linkages, respectively.
