epimer

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Related to epimers: Mutarotation, Anomers

ep·i·mer

 (ĕp′ə-mər)
n.
One of two molecules that differ in the spatial arrangement of atoms or groups surrounding only one of two or more chiral atoms in the structure.
[epi- + -mer, isomer.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

epimer

(ɪˈpɪməˌrɪzəm) chem
n
(Chemistry) either of two optical isomers differing from each other only in the configuration of the atoms about one asymmetric carbon atom
n
(Chemistry) either of two isomers differentiated by the position of the atoms around a single asymmetric carbon atom
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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In order to obtain optically pure 1 and 2, (20R,24R)-3,6-diacetyl-20,24-epoxydammar-3[beta],6[alpha],12[beta],25-tetraol (3) and (20R,24S)-3,6-diacetyl-20,24-epoxydammar-3[beta],6[alpha],12[beta],25-tetraol (4) were designed and prepared to enhance the polarity difference of C24 epimers. Two suitable crystals of 3 and 4 were obtained and their structures were determined by 1H NMR, 13C NMR, HR-MS and X-ray single-crystal diffraction.
Synthesis and Crystal Structures of 3,6-diacetylated C24 epimeric 20(R)-Ocotillol-Type Saponins
7-Hydroxydehydroepiandrosterone epimers in human serum and saliva.
The saliva exposome for monitoring of individuals' health trajectories
ESR study on the structure-antioxidant activity relationship of tea catechins and their epimers. Biochim Biophys Acta.
Effect of green tea extract on exercise-induced oxidative stress in obese men: A randomized, double-blind, placebo-controlled, crossover study
While individually quantitating D2 and D3 isomers, the Topaz System running the Vitamin D 200M Assay Kit, also automatically differentiates between D3 epimers, providing the specificity to deliver highly accurate diagnostic results in a single analysis.
Sciex Diagnostics Launches US FDA-Cleared Vitamin D Assay Kit for Mass Spectrometry
It is a branched heteropolysaccharide consisting of two glucose epimers, [beta]-D-glucopyranose and [beta]-D-mannopyranose, and galactose units which are bioactive for hepatocytes.
Lignin-Carbohydrate Complexes Based Spherical Biocarriers: Preparation, Characterization, and Biocompatibility
Variable wavelength and diode array detection (DAD) are appropriate options for the analysis of tetracyclines and their epimers. This technology is available in most laboratories.
Tetracyclines in Food and Feedingstuffs: From Regulation to Analytical Methods, Bacterial Resistance, and Environmental and Health Implications
When COX-2 is acetylated by aspirin, interaction with 5-lipoxygenase (5-LOX) occurs that triggers the transcellular biosynthesis of 15R epimers of lipoxins [29, 38].
Alleviating Promotion of Inflammation and Cancer Induced by Nonsteroidal Anti-Inflammatory Drugs

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