anomer

anomer
One of two sugar molecules that are epimeric at the hemiacetal or hemiketal carbon atom (carbon-1 in aldoses, carbon-2 in most ketoses); e.g., α-d-glucose and β-d-glucose. SEE ALSO: sugars. Cf.:epimer.

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an·o·mer 'an-ə-mər n a cyclic stereoisomer of a carbohydrate with isomerism involving only the arrangement of atoms or groups at the aldehyde or ketone position
an·o·mer·ic .an-ə-'mer-ik adj

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an·o·mer (anґo-mər) [ana- + -mere] either of a pair of cyclic diastereoisomers of a sugar or glycoside, differing only in the configuration at the reducing carbon atom and resulting from the new point of symmetry created by ring formation; they are designated α- and β- to denote position of the hydroxyl group below and above the plane of the ring, respectively.

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  • Anomer — In sugar chemistry, an anomer is a special type of epimer. It is a stereoisomer (diastereomer, more exactly) of a saccharide (in the cyclic form) that differs only in its configuration at the hemiacetal (or hemiketal) carbon, also called the… …   Wikipedia

  • Anomer — A|no|mer [griech. áno̅ = oben; ↑ Isomer], das; s, e; auch A|no|me|re, das; n, n: bei Monosacchariden bes. Bez. für die beiden ↑ Epimeren, die bei Ring Kette Tautomerie infolge Umwandlung der offenkettigen Aldose bzw. Ketose in die cycl.… …   Universal-Lexikon

  • Anomer — Die beiden Anomere der Furanoseform der D Erythrose. Das anomere Zentrum ist hier das Kohlenstoffatom in der rechten Spitze des Moleküls …   Deutsch Wikipedia

  • anomer — noun Any diastereoisomer of a sugar or derivative differing in configuration only at C 1 of an aldose or C 2 of a ketose …   Wiktionary

  • anomer — n. one of two sugar molecules that pertain to epimers which differ in the manner they are configured about their respective carbonyl carbon atom …   English contemporary dictionary

  • anomer — an·o·mer …   English syllables

  • anomer — …   Useful english dictionary

  • Mutarotation — is the change in the optical rotation that occurs by epimerization (that is the change in the equilibrium between two epimers, when the corresponding stereocenters interconvert). Cyclic sugars show mutarotation as α and β anomeric forms… …   Wikipedia

  • Carbohydrate — Carbohydrates (from hydrates of carbon ) or saccharides (Greek σάκχαρον meaning sugar ) are the most abundant of the four major classes of biomolecules, which also include proteins, lipids and nucleic acids. They fill numerous roles in living… …   Wikipedia

  • Anomeric effect — In organic chemistry, the anomeric effect or Edward Lemieux effect is a stereoelectronic effect that describes the tendency of heteroatomic substituents adjacent to a heteroatom within a cyclohexane ring to prefer the axial orientation instead of …   Wikipedia

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