cis-trans isomerism

(redirected from Cis-trans)
Also found in: Medical.

cis-trans isomerism

[′si¦stranz ī′säm·ə‚riz·əm]
(organic chemistry)
A type of geometrical isomerism found in alkenic systems in which it is possible for each of the doubly bonded carbons to carry two different atoms or groups; two similar atoms or groups may be on the same side (cis) or on opposite sides (trans) of a plane bisecting the alkenic carbons and perpendicular to the plane of the alkenic system.
References in periodicals archive ?
The Cycloporin A is a cis-trans peptidyl-prolyl isomerase (PPlase) which carry on the functions of different proteins by getting in contact with target proteins, actually PPlase catalyzes the cis-trans peptidyl-prolyl isomerization of prolyl-peptide bonds (Sherry et al., 1992; Walsh et al., 1992; Fruman et al., 1994).
Upon comparisons of CYP protein motifs, we found that the cyclophilin-type peptidyl-prolyl cis-trans isomerase proteins subfamily has a conserved pattern: [FY]-x(2)-[STCNLVA]x-[FV]-H-[RH]-[LIVMNS]-[LIVM]-x(2)-F-[LIVM]-x-Q-[AGFT]-G (PROSITE accession number PS00170).
Sequence analysis of peptidyl-prolyl cis-trans isomerase C (ppiC) from positive clones similar to 100% homology: Query--PPIase C sequence obtained by sequencing, subject-retrieved PPIase C sequence of S.
Quitevis, "Dynamical solvation effects on the cis-trans isomerization reaction: photoisomerization of merocyanine 540 in polar solvents," The Journal of Physical Chemistry, vol.
The effect of temperature on the cis-trans isomerization process of lisinopril was investigated in order to determine different thermodynamic parameters ([DELTA]H, [DELTA]S, and [DELTA]G).
Cti polypeptide is responsible for the localization of cis-trans isomerase in periplasmic space.
Lischka, "Nonadiabatic molecular dynamics study of the cis-trans photoisomerization of azobenzene excited to the Sj state," The Journal of Physical Chemistry A, vol.
For this dimer specie, there are two possible conformers (cis-trans and trans-cis) depending on the positions of the hydrogen atoms bonded to the oxygen atom of the boronic group, whether they are directed away from (trans) or toward (cis) the phenylboronic ring.
Maga, "Cis-trans fatty acid ratios as influenced by product temperatures of extrusion-cooking," Lebensmittel-Wissenschaft & Technologie, vol.
The reaction mechanism is similar to other palladium-catalysed cross-coupling reactions and it consists of oxidative addition, cis-trans isomerization, deprotonation (also called alkynylation), and reductive eliminantion steps.
This proposal combines high level electronic structure calculations and state of the art dynamics simulation methods to study the photochemical reactivity of Protonated Schiff Bases, a prototypical cis-trans isomerizing system, relevant for many photo-biological processes.
The photoinduced cis-trans isomerization of organic photofunctional materials (such as Schiffbase and azobenzene derivative) has presented many interesting features, and their applications range from electronics to nonlinear devices [34-37].