Lecture14and15 - Carbohydrate Structure: Monosaccharides...

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Simple trioses Fischer projections enantiomers Carbohydrate Structure: Monosaccharides Empirical formula: (C-H 2 O)n Extremely hydrophilic (high potential to form H-bonds) Polyalcohols with a ketone or aldehyde moiety: “ketose” vs. “aldose”
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Carbohydrate Structure: Monosaccharides Common hexoses Multiple chiral carbon centers “Farthest asymmetric carbon” determines “D” or “L” designation D-glucose, D-mannose and D-galactose differ in stereochemistry about one carbon—these are referred to as “epimers”
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Carbohydrate Structure: hexoses in solution When dissolved in water, hexoses assume ring structures and form structures referred to as “ hemiacetals ” or “ hemiketals see cyclization The C-1 carbon atom is called the anomeric carbon atom – can exist in equilibrium between two stereochemical states: α or β ( anomers ) This is called “mutarotation
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Pyranose rings can assume different conformations Haworth Hydroxyl substituents can adopt either an
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This note was uploaded on 05/05/2011 for the course BIOL 400 taught by Professor Dr.biology during the Spring '11 term at University of Tennessee.

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Lecture14and15 - Carbohydrate Structure: Monosaccharides...

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