Biochemistry 2280A Lecture Notes - Lecture 7: Fischer Projection, Polysaccharide, Pentose
20 Feb 2017
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Document Summary
Apply appropriate terminology to describe carbohydrates, without memorizing the structures of individual sugars. Convert a cyclized monosaccharide between fischer and haworth projections. Describe how monosaccharides are joined to make polysaccharides. Compare the structures of polysaccharides used for energy storage. Describe the difference between dietary fibre and carbohydrates used for energy metabolism. Give examples of the major roles played by carbohydrates in biological systems. General formula: (ch2o)n: n = 3 to 7, triose, tetrose, pentose, hexose, heptose. Represented by fisher projections: horizontal bonds come out of the page (wedge, vertical bonds go into the page (dash) Each monosaccharide has a carbonyl group: aldose carbonyl group is at the end of the molecule (aldehyde, ketose carbonyl group is not at the end of the molecule (ketone) Each carbon in a monosaccharide is numbered, starting from the end closest to the carbonyl group. D or l based on the orientation of the hydroxyl group on the highest numbered.
