NUTR 3210 Lecture Notes - Lecture 5: Pentose Phosphate Pathway, Reducing Sugar, Glycogen Synthase

• School: University of Guelph
• Department: Nutrition
• Course: NUTR 3210
• Professor: David Mutch

Document Summary

Considered a reducing sugar if the anomeric carbon is free. Cannot be hydrolyzed into a small unit: disaccharides. Two monosaccharides joined by an acetyl bond (glycosidic bond) All have a h:o ratio of 2:1. Why is it important: biological systems are stereospeci c. Same molecular formula and sequence, but differ in 3d space due to choral carbon atoms. What is a chiral carbon atom: a carbon with four different atoms or groups attached to it. Thursday, january 26, 2017: diastereomers (not a mirror) Chiral carbon: counting begins with carbonyl carbon. Fischer projection: exists in 2 forms: d vs. l, determined by the -oh group on the highest choral carbon, oh on the right = d, oh on the left = l. The number of stereoisomers for a molecule is 2^n (where n = # of chiral atoms) D-monosaccharides are more important because digestive enzymes are stereospeci c for d- sugars. Converting a fischer protection to haworth mode;