exocyclic


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exocyclic

[‚ek·so′sī·klik]
(cell and molecular biology)
Pertaining to the outside of a ring structure.
References in periodicals archive ?
HMBT molecules are chemically adsorbed on the iron surface via the exocyclic sulfur and nitrogen atoms.
The enzyme follows ping-pong kinetics, with the occurrence of a covalent acetyl-enzyme intermediate at the active site cysteine using acetyl CoA or another acetyl donor, and then transfers the acetyl group to the substrate's exocyclic nitrogen (N-acetylation) or the hydroxyl oxygen (O-acetylation) [10].
The rate of diminution on exocyclic double bond, during photolysis, is faster for longer aliphatic chain containing polymers than shorter aliphatic chain containing polymers [25] attributed to folding tendency of methylene units present in the polymer chain.
A doublet of triplet at d 3.45 (J= 14.7, 7.5 Hz) and a triplet at d), 2.74 (J= 14.7, 7.5 Hz) corroborated the presence of two exocyclic methylene groups.
Among their topics are enzymatic antioxidant defense, the isoprostanes as accurate markers and potent mediators of oxidant injury in vivo, hydroxyoctadecadienoic acid (HODE) as a marker of linoleic acid oxidation, the immunochemical detection of lipid peroxidation-specific epitopes, covalent modifications of albumin Cys34 as a biomarker of mild oxidative stress, and exocyclic DNA adducts as biomarkers of antioxidant defense and oxidative stress.
In the [sup.13]C and DEPT 135 NMR spectra determined in pyridine,, an exocyclic methylene peak at [[delta].sub.C] 112.60 suggests that this cytochalasin is structurally related to cytochalasin D.
Part VI: Se[O.sub.2]/[H.sub.2][O.sub.2] oxidations of exocyclic olefins.
Compound 3 is of interest because the exocyclic double bond is part enamine, part vinyl ether, part diene and part |A, |A-unsaturated ketone simultaneously.
There was an accompanying distortion of the exocyclic angles at C(1A) with the C(2A)-C(1A)-O(1A) bond angle of.
Then any data point appearing in the can1-can2 plot can be used to determine the sugar pucker conformation (can1 > -6.77 for C3'-endo and can1 < -6.77 for C2'-endo) as well as the exocyclic [gamma]-torsion angle (can2 < -16.82 for gt and can2 > -16.82 for gg).
Recently, TDG was also shown to be involved in T mispairing with several types of exocyclic etheno-base lesions, such as [epsilon]C [29].