A polysaccharide fraction extracted from soybean seeds with boiling water was ex-amined by several fractionation methods on ultracentrifugal criteria. Four components were found by a column chromatography using TEAE-cellulose or by a paper electrophoresis. Acetone-precipitation, fractionation by conversion into acetyl derivative, and copper- com-plex-precipitation were unsatisfactory to fractionate into the components. The major com-ponent (70%) isolated was an arabinogalactan containing residues of arabinose and galactose in the approximate proportion of 1:2 and having molecular weight of 3.3×105.
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Makio Moria (1965) studied this question.