epimer

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Related to epimers: Mutarotation, Anomers

epimer

 [ep″ĭ-mer]
one of two or more optical isomers that differ only in the configuration around one asymmetric carbon atom. adj., adj epimer´ic.

ep·i·mer

(ep'i-mĕr),
One of two molecules (having more than one chiral center) differing only in the spatial arrangement about a single chiral atom, for example, α-d-glucose and α-d-galactose (with respect to carbon-4).
See also: sugars. Compare: anomer.
[epi- + G. meros, part]

epimer

/ep·i·mer/ (ep´ĭ-mer) either of two optical isomers that differ in the configuration around one asymmetric carbon atom.

ep·i·mer

(ep'i-mĕr)
One of two molecules (having more than one chiral center) differing only in the spatial arrangement about a single chiral atom.
See: sugars
Compare: anomer
[epi- + G. meros, part]

epimer

one of two or more isomers which differ only in the configuration about one carbon atom.
References in periodicals archive ?
As it seems unlikely that the vitamin D sufficiency/insufficiency status of an individual would be altered by the presence of the epimer, it is not necessary to quantify the epimer in these subjects.
Different erythrinaline alkaloids have been isolated from the flowers and pods of Erythrina lysistemon, and among them the new compounds are (+)-11[beta]-hydroxyerysotramidine, (+)11[beta]-hydroxyerysotrine N-oxide (69), and two C-11 epimers (70 and 71), (+)-11[beta]-methoxyerysotramidine N-oxide (72), (+)-11[beta]-hydroxyerysotrine, and 11-dehydroerysotrine (73).
Misleading measures in vitamin D analysis: a novel LC-MS/MS assay to account for epimers and isobars.
Stereoselective total synthesis of (+)-oploxyne A, (--)-oploxyne B, and their C-10 epimers and structure revision of natural oploxyne B.
All of the methods used in this study, including LC-MS/MS, detect epimers to a variable degree and this characteristic may have contributed to the scatter and bias observed for some assays.
These include: (20S,24S)-20,24-Dihydroxy-3,4-secodammara-4(28), 25-diene-3-car-boxylic acid; (20S,23E)-20,25-Dihydroxy,3,4-secodamrnara-4(28), 23-diene-carboxylic acid; (23E)-(20S)-20-hydroxy- 25-methoxy-3, 4,-secodammara-4(28),23-diene-3-carboxylic acid; Methylester of 20S, 24-Epoxy-25,26,27-trisnor-24-oxo-3,4-seco-4(28)-darnmaren-3-carboxylic acid; Mixture of epimers Eichlerianic acid (24(S) [8a]) and Shoreic acid (24(R) [8b]); Mixture of epimers Cabraleone (24(S)) and Ocotillone (24(R)); Aglaiol; 24,25-Epoxy-dammar-20-ene-3-one; 24,25-Dihydroxy-5[alpha]-dammar-20-ene-3-one; 24, 25-Dihydroxy-5[alpha]-dammar-20-ene-3-one; 31-Nor-cycloartenol (29-Nor-cycloartenol); 4a, 14-Dimethyl-9,19-cyclocholestan-3[beta],24[alpha],25-triol; 13.