NUR1 200 Study Guide - Final Guide: Glycogen Phosphorylase, Glycogen Synthase, Acetyl-Coa

• School: McGill University
• Department: Nursing
• Course: NUR1 200
• Professor: Frederick P Nestel

Document Summary

Monosaccharides with five or more carbons exist in cyclic form in solution. Storage forms used as energy source ex: starch, glycogen. Structural elements ex: chitin (insect exoskeleton, mushrooms), cellulose. Extracellular support ex: peptidoglycan (cell wall of gram-negative & gram-positive bacteria), extracellular matrix: glycoconjugates. Polysaccharides and oligosaccharides can act as information carriers (signal molecules). Carbohydrate moiety is covalently bound to a protein or lipid. Destination labels, mediators of cell-cell and cell-matrix interactions. Interactions include cell-cell recognition, adhesion, migration during development, clotting, immune response, wound healing: glycoproteins. Carbohydrate ~1-70% of the mass of a glycoprotein molecule. O-linked oligosaccharides attach through a glycosidic link to the oh-group of a serine ser residue or a threonine thr residue. N-linked oligosaccharides attached through an n-glycosyl link to the amide group of an asparagine asn residue. Many proteins are secreted by eukaryotic cells as glycoproteins ex: immunoglobulins, many peptide hormones, milk proteins.