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3.3.2 Structure of oligosaccharides
Raffinose, also called melitose, is a trisaccharide that is widely found in legumes and cruciferous vegetables, including beans, peas, cabbage, brussels,sprouts, and broccoli. It consists of galactose connected to sucrose via a α 1→6 glycosidic linkage. Humans cannot digest polysaccharides with this linkage and the trisaccharides are fermented in the large intestine by gas-producing bacteria.
Stachyose is a tetrasaccharide containing glucose, fructose and two galactose units. It occurs in legumes and dry beans and peas.
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Last modified: Thursday, 10 November 2011, 6:24 AM