epimer


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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]

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]
References in periodicals archive ?
Considering the 3[alpha]/[beta]-[[sup.18]F]FCA epimers, it was found that 3[alpha]-[[sup.18]F]FCA shows a slight, yet significant decrease in time-to-peak of the liver TAC and excretion to gallbladder and intestines proceeded faster.
One of those confounders is the C-3 epimer of (3-epi) 25(OH)[D.sub.3], which was previously thought to exist in infants only and, as such, wasn't of much concern, but is now known to be present at variable, albeit low, levels in virtually all human serum (J.
Zeynep Aydin Ozemir, Istanbul Universitesi Istanbul Tip Fakultesi, Noroloji Anabilim Dali ve Epilepsi Merkezi (Epimer), Istanbul, Turkiye Gsm: +90 505 803 21 26 E-posta: drzeynepaydin@yahoo.com
Because of the position of chiral carbons, which makes the product technically a C-4 epimer of D-fructose, only about 20 percent of the sugar is metabolized.
Abstract.--Idarubicin (structural analogue of daunomycin) and epirubicin (epimer of adriamycin) are two "second-generation" anthracyclines that are widely used in chemotherapy against leukemias and metastatic breast tumors, respectively.
Alginate is a beta- 1,4-linked polymer of mannuronic acid and its C5 epimer, guluronic acid.
412.43, in Orion 109.8-10, in Choeroboscus, Epimer. in Psalmis 3.39.16 Gaisford, in Helladius apud Phot.
Keywords: 20(R)-protopanaxatriol; Ocotillol-type saponin; Epimer; Synthesis; Crystal structure.
Currently, [gamma]-sitosterol, an epimer of [beta]-sitosterol, has been insisted to possess antihyperglycemic activity by increasing insulin secretion in response to glucose confirmed with immune histochemical study of pancreas [14,15].
Alginate, the biopolymer of b-D- mannuronic acid its C-5 epimer a-L-guluronic acid, has wide range of industrial and pharmaceutical applications (Butt et al., 2011).
2002) suggested the presence of a pure 25R epimer. Compound 2 was identified as 26-O-[beta]-D-glucopyranosyl(25R)-furost-5-ene-3,22,26-triol 3-O-[ [beta]-D-glucopyranosyl-(1[right arrow]2)]-[alpha]-L-rhamnopyranosyl-(1[right arrow]4)-[beta]-D-glucopyranoside (Fig.