polysaccharides as biopolymers
Автор: Erland Stevens
Загружено: 2019-01-28
Просмотров: 297
Polysaccharides are biopolymers. They are constructed from sugar monomers through the formation of glycosidic linkages. Polysaccharides are condensation polymers. Interestingly, the condensation chemistry involves acetal chemistry, not acid derivative chemistry. In the polymerization, the anomer center of a sugar loses the OH group to form an oxonium ion. The electrophilic oxonium ion is attacked the OH group on another sugar to form a linkage between the two sugars. The glycosidic linkages can be specified based on the stereochemical outcome (alpha or beta) and positioning of the ring carbons (1,4 or 1,6, etc.). Common examples of polysaccharides include cellulose and glycogen.
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