Title: Isolation and an N.M.R. study of pectins from flax (linum usitatissimum L.)
Abstract: The EDTA-extracted pectins from flax, which were fractionated by exclusion chromatography according to size, contained galactose, galacturonic acid, rhamnose, glucose, and traces of arabinose. The main components of the major fraction, a high-molecular-weight galactan, were →4)-β-Galp-(1→ chains and β-Galp non-reducing terminal units according to 1D 1H- and 13C-n.m.r. analysis. The low-molecular-weight fractions contained notable amounts of rhamnose and galacturonic acid. On the basis of multipulse n.m.r. (CHORTLE, COSY, and NOESY), a rhamno-galacturonan structure of type I with β-Galp units attached to the HO-4 of rhamnose can be proposed. This polymer probably constitutes the backbone of the high-molecular-weight polysaccharides.
Publication Year: 1990
Publication Date: 1990-03-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 80
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