In stereochemistry, epimer refers to one of a pair of stereoisomers. The two isomers differ in configuration at only one stereogenic center. All other stereocenters in the molecules, if any, are the same in each. Doxorubicin and epirubicin are two closely related drugs and epimers. The stereoisomers β-D-glucopyranose and β-D-mannopyranose are ep...
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A diastereoisomer that has the opposite configuration at only one of two or more tetrahedral 'stereogenic' centres present in the respective molecular entity. IUPAC STEREOCHEMICAL GLOSSARY (1993).
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One of two steroisomers with more than one chiral center that differ in stereochemical configuration at only one.
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http://www.chemicalglossary.net/definition/653-Epimer
<biochemistry> Diastereomeric monosaccharides that have opposite configurations of a hydroxyl group at only one position, for example D glucose and D mannose. ... (18 Nov 1997) ...
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(ep´ĭ-mәr) one of two or more optical isomers that differ only in the configuration around one asymmetric carbon atom. adj., epimer´ic., adj.
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Diastereomeric monosaccharides that have opposite configurations of a hydroxyl group at only one position, eg. D-glucose and D-mannose.
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Type: Term Pronunciation: ep′i-mĕr Definitions: 1. One of two molecules (having more than one chiral center) differing only in the spatial arrangement about a single chiral atom, α-d-glucose and α-d-galactose (with respect to carbon-4).
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either of a pair of isomeric aldose compounds, esp. of certain sugars, that differ from each other in the positions of the H and OH at the second atom from the end of the carbon chain, as d-glucose and d-mannose.
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