01:694:301 Chapter Notes - Chapter 7: Epimer, Hemiacetal, Polysaccharide

• School: Rutgers University
• Department: Molecular Biology and Biochemistry
• Course: 01:694:301
• Professor: F.Deis

Document Summary

Have formula ( cha) on every monosaccharide has. 1 or more except center , dihydroxyacetone chiral. Monosaccharides are either aldehydes (cid:8869) smallest monosaccharides have 3carbo# or ketones ( aldehyde s ) s = o c l. D - glyceraldehyde aldehyde always @ c - i ( k et on e ) H - c - oh l ( = o l. H dihydroxy acetone ketone always on c - 2 no l - d bc no chiral carbon ! Lid designates configuration of chiral carbon farthest away from or i. L - erythrose: in d isomers , in l isomers. Differ in configuration about 1 chiral carbon. C- 2 at: not epimers , carbons diff in 2 chiral. Carbohydrates: open chain structures (cid:8869)generally predominate bc lower in e and more stable cyclize to dorm ring structures. 5 " 6 rings most stable basis of this rxn is the nucleophilic attack of carbonyl by oh.