BIOCHEM 2EE3 Lecture Notes - Aldohexose, Tetrose, Amylose
17 Mar 2014
School
Department
Course
Professor
Document Summary
D-glucose: monosaccharide carbohydrate that is an aldohexose, and has 4 chiral centers. This is one of 16 possible stereoisomers of glucose: epimers: sugars that differ only in the con guration of one carbon atom. D-fructose: a ketohexose monosaccharide with 3 chiral centers. One of 8 possible stereoisomers of fructose: d-sugars are much more bundant than l-sugars, sugar"s name that lacks d/l pre x refers to the d-sugar. Glycans: polysaccharides composed of monosaccharides joined by glycosidic bonds. This regularly repeating polymer forms a left- handed helix. Note the great differences in structure and properties that result from changing alpha-amylose"s alpha-(1s4) linkages to the alpha- (1s4) linkages of cellulose (fig. Glycogen: storage of polysaccharides in animals: resembles amylopectin, but it is more branched, present in all cells. The most prevalent in skeletal muscle and liver: highly branched structure allows rapid mobilization of glucose.
