Sucrose oligosaccharides containing residues

Robinia pseudacacia resulted in accumulation of free fructose and oligosaccharides containing principally glucose residues. Transfructosidases have also been found in both plant nectar and insect viscera. A trans-glucosidase with specificity different from the other enzymes described occurs in honeydew and manna formed by certain insects. This enzyme is produced by the insects, not the plant, and transfers glucosyl groups to the 3-position of the fructose of sucrose. ... 

Specificity studies of yeast invertase are complicated by the difficulty of preparing jS-fructofuranosides, and the studies have been limited to the naturally occurring di- and oligosaccharides containing /S-fructofuranoside residues. Sucrose, raffinose, and stachyose have such residues in an unsubstituted condition (terminal positions) whereas melezitose has a substituted /3-fructofuranoside residue (central position). Inulin is a polymeric p-... 

Beans, peas, soybeans, and other leguminous plants contain oligosaccharides with (1,6)-linked galactose residues that cannot be hydrolyzed for absorption, including sucrose with 1, 2, or 3 galactose residues attached (see Fig. 27.10). What is the fate of these polysaccharides in the intestine ... 

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