Abstract
After degradation of sugar beet cell walls with Driselase® and fractionation of the solubilised products by hydrophobic interaction chromatography, a dehydrodiferuloylated oligoarabinan was isolated. Its structure was assigned to two dimers of (1 → 5)-linked arabinose units esterified by a central 8-O-4′ ferulic dimer. These results provide the first direct evidence that pectic arabinans in sugar beet cell walls may be covalently cross-linked through dehydrodiferulates.
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