stereoisomer


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Related to stereoisomer: chiral, optical isomer

stereoisomer

 [ster″e-o-i´so-mer]
a compound showing stereoisomerism.

ster·e·o·i·so·mer

(ster'ē-ō-ī'sō-mĕr),
A molecule containing the same number and kind of atom groupings as another but in a different arrangement in space; the stereoisomers are not interconvertible unless bonds are broken and reformed, by virtue of which the molecule exhibits different optic properties, for example, as between d- and l-amino acids, or 5α- and 5β-steroids. Compare: isomer.
[stereo- + G. isos, equal, + meros, part]

ster·e·o·i·so·mer

(ster'ē-ō-ī'sŏ-mĕr)
A molecule containing the same number and kind of atom groupings as another but in a different arrangement in space, in virtue of which it exhibits different optic properties, e.g., as between d and l amino acids, 5α and 5β steroids.
Compare: isomer
[G. stereos, solid + G. isos, equal, + meros, part]

stereoisomer

one of two or more isomers that have the same molecular structure but differ in the spatial arrangement of the atoms in the molecule.

ster·e·o·i·so·mer

(ster'ē-ō-ī'sŏ-mĕr)
A molecule containing the same number and kind of atom groupings as another but in a different arrangement in space, in virtue of which it exhibits different optic properties.
[G. stereos, solid + G. isos, equal, + meros, part]
References in periodicals archive ?
Stereoisomers deliver the same molecular formula, but with a different three-dimensional arrangement, which may confer different biological properties.
This double bond can lead to the formation of different isomers (stereoisomers) with different properties yet the same chemical formulation.
It is noteworthy that GC-MS assays commonly used for urine organic acid analysis do not distinguish between the stereoisomers of 2-hydroxyglutaric acid.
To determine individual stereoisomer contribution to the commercial mixture effects observed in the literature, ~ 10% alpha (3 mg/kg) and 90% gamma (30 mg/kg) metabolic profiles were compared to the 30 mg/kg CM-HBCD.
Most pharmaceutical compounds, for instance, are synthesized as a mixture of chemically distinct molecules called stereoisomers. (35) The most common type of stereoisomerism results from so-called "chiral centers," carbon atoms bonded to four different parts, which can be either "right-handed" (R) or "left-handed" (S).
This molecule possesses three centers where stereoisomers can occur, and the naturally occurring molecule is the D-[alpha]tocopherol (RRR-[alpha]-tocopherol) configuration that has the highest vitamin activity (McDonald et al., 2011).
SDMA, the stereoisomer of ADMA, is obtained by the addition of one methyl group on either guanidino nitrogen of the arginine residue.3
Recent examples of pheromone synthesis: (1) A single stereoisomer of the insect pheromone shows bioactivity
Meanwhile, the determination of RIN and its stereoisomer, IRN, in biological samples by HPLC or LC-MS methods have also been performed to understand their pharmacokinetic properties and assess their tissue distribution [17-19].
Focusing on the commercially available "L"-handed stereoisomer form of PLA (PLLA), Korean researchers discuss how PLA's slow crystallization speed might be accelerated.
In order to evaluate the correct orientation of amino acid side chains belonging to the cyclic region of URP in the activity of the peptide, each amino acid has been replaced with the corresponding stereoisomer in a D-scan analysis [47].