BCH 3120 Lecture Notes - Lecture 5: Glycosidic Bond, Postprandial, Glycogen

• School: University of Ottawa
• Department: Biochemistry
• Course: BCH 3120
• Professor: Luc Poitras

Document Summary

Lec 5 - glycogen metabolism and pentose phosphate. Lec 5 - glycogen metabolism and pentose phosphate pathway. A glucose polymer (100 000+ molecules of glucose per molecule of glycogen) Molecules of d - glucose are linked together by o-glycosidic bonds. Glycosidic bond: a bond linking a sugar with another molecule. In glycogen, the other molecule is another glucose. Alpha 1 intra chain bond vs alpha 1 inter chain bond. The end of the molecule containing a free carbon number 1. One molecule of glycogen has the same osmotic pressure as one molecule of glucose. If glucose was stocked unchanged in the cell, the cell would be highly osmotic, water would permeate into the cell, and pumping out excess water would be too costly in energy. The )-glycosidic links stabilize the glucose units by making them less likely to be oxidized.