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Biochemistry Unit 3 Flashcards

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13464376976Carbohydrate functionsEnergy source and storage Structure of cell walls and exoskeleton Informational molecules in cell-cell signaling0
13464383086EnantiomersStereoisomers that are mirror images1
13464385631DiastereomersStereoisomers that are not mirror images2
13464387800AnomersStereoisomers and diastereomers that differ in configuration around anomeric C3
13464403318EpimersDiastereomers w/ only 1 different stereocenter4
13464405782Glycosidic Bond2 sugar molecules joined between anomeric carbon & hydroxl carbon5
13464409439Reducing vs. Non-ReducingReducing: - free anomeric carbon - hemiacetal Non-Reducing: - glycosidic bond between 2 anomeric carbons6
13464523985Common SugarsRibose Glucose Galactose Mannose Fructose7
13464525879RiboseStandard 5-C sugar8
13464527907GlucoseStandard 6-C sugar9
13464530080GalactoseC-4 epimer of glucose10
13464534813MannoseC-2 epimer of glucose11
13464677616FructoseKeto form of glucose12
13464680712Hemiacetal vs HemiketalHemiacetal - aldehyde attacked by alcohols Hemiketal - ketones attacked by alcohols13
13464712943Cyclization of MonosaccharidesHemiacetal formed by nucleophilic alcohol attacking electrophilic carbonyl carbon (reduced to OH) -> forms ring structure14
13464756337Common DisaccharidesLactose: Glucose + Galactose Sucrose: Glucose + Fructose15
13464803090PolysaccharidesGlycogen Starch Cellulose Chitin16
13464805588GlycogenBranched Main storage polysaccharide in animals17
13464807442StarchUnbranched Main storage polysaccharide in plants18
13464810552CelluloseTough and water insoluble Most abundant in nature19
13464813119ChitinHard, insoluble, not digested. By vertebrates Found in cell walls in mushrooms and exoskeletons of insects, spiders, crabs, and other arthropods20
13464869368GlycoconjugatesGlycoproteins Glycolipids Glycosaminoglycans Proteoglycans21
13464873512GlycoproteinsProtein + small oligosaccharides Commonly connect w/ Ser, Thr, and Asn22
13464875455GlycolipidsLipids + oligosaccharides Can serve as endotoxin (promote sepsis)23
13465007949GlycosaminoglycansLinear, repeating disaccharide units Forms mesh work w/ fibrous proteins to form ECM24
13465010694ProteoglycansSulfated glucosaminoglycans on protein in cell membrane Syndecans and glypicans25
13465015550SyndecansProtein w/ single transmembrane domain26
13465016681Glypicansprotein is anchored to a lipid membrane27
13465019134Proteoglycans AggregatesHold 1000x water and provide lubircation Cover joint surfaces (reduce friction and balance loads28
13465027448ECM ComponentsProteoglycans aggregates Collagen fibers Elastin29
13465035126GlycationNon-enzymatic covalent linking of a sugar to another macromolecule30

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