Biochemistry 2280A Lecture 7: Biochem 2280 topic 7
22 Oct 2018
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Required readings: ecb p. 52-53, 70-71, 377, 380: sugars are both energy sources and subunits of polysaccharides, monosaccharides have formula (ch2o)n, where n = 3, 4, 5, or 6. 2 3. glycosidic linked of giant units. a of of group proteins, Because each monosaccharide has several free oh groups that also linked by condensation: oligosaccharides refers to 2-10 monomers can link, sugar polymers can be branched, and the number of possible polysaccharide structures is very large. Therefore, it is much more difficult to determine the arrangement of sugars in a complex polysaccharide than to determine nucleotide sequence of a dna molecule. In aqueous solution, the aldehyde/ketone groups react with oh group of same molecule, making a ring structure. These small differences make only minor changes in the chemical properties of the sugars. But the differences are recognized by enzymes and other proteins and therefore can have major biological effects.
