Sentences with phrase «reaction center»

Jennifer Ogilvie, U-M professor of physics and biophysics, studied photosynthetic reaction centers in purple bacteria.

Over a span of femtoseconds, they followed the light energy through the scaffolding to the cellular reaction centers where energy conversion takes place.

The solution of the structure of the photosynthetic reaction center from the bacterium Rhodopseudomonas viridis is described, and the structure of this membrane protein complex is correlated with its function as a light - driven electron pump across the photosynthetic membrane.

From there, the energy is shuttled to a photosynthetic reaction center protein that starts to channel energy from light through the photosynthetic process.

Mulfort's work builds upon knowledge of the protein reaction center structures that accomplish natural photosynthesis.

Director of the School of Chemistry & Applied Biomedical Sciences Mekhman Yusubov says, «Our study dates back to 2009 when we synthesized benziodoxaborole with two reaction centers with iodine and boron atoms at a time.

Conclusions about the structure of the photosystem II reaction center from plants are drawn, and aspects of membrane protein structure are discussed.

A microscopic method for simulating quantum mechanical, nuclear tunneling effects in biological electron transfer reactions is presented and applied to several electron transfer steps in photosynthetic bacterial reaction centers.

Specifically, the team examined the protein scaffold connecting the bacteria's external solar collectors, called the chlorosome, to reaction centers deep inside the cells.

To date, despite a long evolutionary history, species containing (bacterio) chlorophyll - based reaction centers have been reported in only

Functional type 2 photosynthetic reaction centers found in the rare bacterial phylum Gemmatimonadetes.

The organisms using it efficiently transport the energy of sunlight from receptors, which gather photons from sunlight, to reaction centers where the energy may be harnessed — a performance easily rivaling the most efficient humanmade solar cells.

This illustration is a model of Chl f synthase, potentially a ChlF dimer, based on the known X-ray structure of the core of the Photosystem II reaction center.

Photons excite the pigments, which triggers energy transfer in the photosynthetic reaction centers.

«The antennae take solar energy and create a molecular excitation, and in the reaction center, the excitation is converted to a charge separation,» Ogilvie said.

These centers are similar to the reaction centers in plants, except they use different pigments to trap and extract energy from light.

There are six slightly differently colored pigments in purple bacteria's reaction centers.

The electron could use the quantum effect of superposition, where a particle can be in two places at once, to test several routes to the reaction center where photosynthesis takes place, and take the most efficient one.

«Having a better understanding of where the energy levels are will be very helpful for establishing the structure - function relationships of these photosynthetic reaction centers.»

When a photon strikes an electron in a leaf, the electron delivers it to another molecule dubbed the reaction center, which converts that light into chemical energy to feed the plant.

By the way, Nobel Prizes were once awarded for the research of each of the reaction centers and we managed to combine them in one substance.

«The finding that a system like the spliceosome, which contains more protein than RNA, uses RNA for catalysis and has a molecular ancestor composed entirely of RNA suggests that the spliceosome's reaction center may be a molecular fossil from the «RNA World.»»

This light energy is then transferred to the organism's reaction center, where photosynthesis takes place.

In the reaction center of such a «protein knot,» which is known as the «active center,» is often one or more metal ions.

The simulations, based on the crystallographic structure of the reaction center from Rhodopseudomonas viridis, focus on electron transfer from a bacteriopheophytin to a quinone and the subsequent back - reaction.

Different strategies emerged during the evolution of natural photosynthesis to collect light in antenna systems and to guide it into the reaction center.

Their paper, titled «Independent initiation of primary electron transfer in the two branches of the photosystem I reaction center,» appears in this week's online Early Edition of the Proceedings of the National Academy of Sciences (PNAS).