Abstract
The seeds of Ulmus glabra have been extracted with water at 90–100°C yielding an extract which, by separation on a combination of anion exchange and gelfiltration columns, gave four different fractions, IA and B, and IIA and B. Structural studies showed that the first two can be designated as arabinogalactans due to the high content of arabinose and galactose, while the latter two fractions are predominantly polygalacturonides of the pectic type. Fractions IA and B contain arabinose both in the furanose and the pyranose form. All four fractions have the structural elements necessary for the binding of the arabinogalactan-Yariv artifical antigen.
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