acceptor molecule

acceptor molecule

a molecule that has a high affinity for electrons, usually passing them on to another acceptor molecule in a series (called an ELECTRON TRANSPORT SYSTEM). As each acceptor receives an electron it becomes reduced and then oxidized as the electron is given up (see REDOX POTENTIAL). Each reduction-oxidation reaction is catalysed by a different enzyme, energy being gradually released with each electron transfer. Acceptor molecules (e.g. CYTOCHROME) are vital in AEROBIC RESPIRATION and PHOTOSYNTHESIS.
References in periodicals archive ?
Transfer of sugar molecule to any acceptor molecule changes its biochemical properties as well as its bioactivity (Vogt and Jones, 2000; Lim and Bowles, 2004).
RO-P Enzyme-substrate complex, E-P phosphoenzyme intermediate, ROH p-nitrophenol, A the acceptor molecule and A-P phosphorylated acceptor.
For example, the primary electron acceptor molecule for photosynthesis is nicotinamide adenine dinucleotide phosphate (NADP).
For a dipole-dipole coupling mechanism, the rate of energy transfer w(r) between a donor and an acceptor molecule depends on the inverse sixth power of their separation distance r.
This excited energy is then transferred to a nearby acceptor molecule, and the donor returns to its ground state.
The Scripps Research Institute (La Jolla, CA) has patented a one-pot glycosylation reaction is disclosed in which a mannosyl (Man) group is enzymatically transferred to an acceptor molecule.
The reactions catalyzed by these enzymes involve the transfer of a sulfuryl group from 3'-phosphoadenosine 5'-phosphosulfate (PAPS) to an acceptor molecule to produce adenosine 3', 5'-diphosphate (PAP) and a sulfuric acid ester.
Fluorescence resonance energy transfer (FRET) [3] involves the transfer of energy from a fluorescent donor molecule via a nonradiative dipole-dipole interaction to an acceptor molecule (1, 2).
The luminescence of a polymer is "quenched" once that polymer has transferred its electrons to the acceptor molecule, which then is attached to the polymer.
When they also attached an acceptor molecule to the other end, the luminescence vanished.
However, these systems have a hard time preventing the wasteful "back electron transfer" reaction, whereby the acceptor molecule simply passes its charge back to its donor and the stored energy is lost.
So, the potential offset at the heterojunction of a donor (with high ionization energy) and an acceptor molecule (with high electron affinity) can be taken advantage of, to split the photo generated excitons [3].