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Photophosphorylation information


The scientist Charles Barnes first used the word 'photosynthesis' in 1893. This word is taken from two Greek words, photos, which means light, and synthesis, which in chemistry means making a substance by combining simpler substances. So, in the presence of light, synthesis of food is called 'photosynthesis'. Noncyclic photophosphorylation through light-dependent reactions of photosynthesis at the thylakoid membrane.

In the process of photosynthesis, the phosphorylation of ADP to form ATP using the energy of sunlight is called photophosphorylation. Cyclic photophosphorylation occurs in both aerobic and anaerobic conditions, driven by the main primary source of energy available to living organisms, which is sunlight. All organisms produce a phosphate compound, ATP, which is the universal energy currency of life. In photophosphorylation, light energy is used to pump protons across a biological membrane, mediated by flow of electrons through an electron transport chain. This stores energy in a proton gradient. As the protons flow back through an enzyme called ATP synthase, ATP is generated from ADP and inorganic phosphate. ATP is essential in the Calvin cycle to assist in the synthesis of carbohydrates from carbon dioxide and NADPH.

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Photophosphorylation

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to form ATP using the energy of sunlight is called photophosphorylation. Cyclic photophosphorylation occurs in both aerobic and anaerobic conditions, driven...

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Electrochemical gradient

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through either noncyclic or cyclic photophosphorylation. Of the proteins that participate in noncyclic photophosphorylation, photosystem II (PSII), plastiquinone...

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Photosynthesis

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synthase enzyme uses that chemiosmotic potential to make ATP during photophosphorylation, whereas NADPH is a product of the terminal redox reaction in the...

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Thylakoid

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enclosed by the thylakoid membrane. It plays an important role for photophosphorylation during photosynthesis. During the light-dependent reaction, protons...

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Cytochrome b6f complex

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reaction, the cytochrome b6f complex plays a central role in cyclic photophosphorylation, when NADP+ is not available to accept electrons from reduced ferredoxin...

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Chloroplast

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more ATP. This is termed cyclic photophosphorylation because the electrons are recycled. Cyclic photophosphorylation is common in C4 plants, which need...

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Hill reaction

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ordered and compartmentalized in a system of membranes. Cell biology Photophosphorylation Daniel I. Arnon Hill, R. (1937). "Oxygen Evolved by Isolated Chloroplasts"...

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Phosphorylation

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glycolysis. ATP is synthesized at the expense of solar energy by photophosphorylation in the chloroplasts of plant cells. Phosphorylation of sugars is...

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Quantasome

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photosystem II.[clarification needed] Light-dependent reactions Photophosphorylation Photosynthetic reaction centre Photosystem II Thylakoid Pearlstein...

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Ferredoxin

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involved in both cyclic and non-cyclic photophosphorylation reactions of photosynthesis. In non-cyclic photophosphorylation, ferredoxin is the last electron...

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Uncoupler

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disrupts oxidative phosphorylation in prokaryotes and mitochondria or photophosphorylation in chloroplasts and cyanobacteria by dissociating the reactions of...

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Adenosine diphosphate

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substrate-level phosphorylation, oxidative phosphorylation, and photophosphorylation, all of which facilitate the addition of a phosphate group to ADP...

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Phototroph

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compounds for their carbon. Photoheterotrophs produce ATP through photophosphorylation but use environmentally obtained organic compounds to build structures...

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Photosystem

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termed noncyclic photophosphorylation, but if they pass through PSI and the proton pump multiple times it is called cyclic photophosphorylation. When the electron...

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Heterocyst

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maintain photosystem I, allowing them to generate ATP by cyclic photophosphorylation. Single heterocysts develop about every 9-15 cells, producing a one-dimensional...

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Glufosinate

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thylakoid lumen, leading to the uncoupling of photophosphorylation. The uncoupling of photophosphorylation causes the production of reactive oxygen species...

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Chemiosmosis

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bacteria, and purple bacteria synthesize ATP by a process called photophosphorylation. These bacteria use the energy of light to create a proton gradient...

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Adenosine triphosphate

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the thylakoid membrane of the chloroplast. The process is called photophosphorylation. The "machinery" is similar to that in mitochondria except that light...

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Oxygen

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membrane, which is used to synthesize adenosine triphosphate (ATP) via photophosphorylation. The O 2 remaining (after production of the water molecule) is released...

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Photodissociation

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transport chain, form a proton gradient across the membrane that drives photophosphorylation and thus the generation of chemical energy in the form of adenosine...

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Archaea

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then converted into ATP by ATP synthase. This process is a form of photophosphorylation. The ability of these light-driven pumps to move ions across membranes...

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Electron transport chain

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as O2 through an electron transport chain, releasing energy. In photophosphorylation, the energy of sunlight is used to create a high-energy electron...

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Photokinesis

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for example, an increase in illumination results in an increase of photophosphorylation which enables an increase in metabolic activity. However the behaviour...

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Phosphorus deficiency

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function. Phosphorus is used by plants in numerous processes such as photophosphorylation, genetic transfer, the transportation of nutrients, and phospholipid...

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Otto Kandler

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He presented the first experimental evidence for the existence of photophosphorylation in vivo. His discovery of the basic differences between the cell...

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DCMU

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Hosler, J. P.; Yocum, C. F. (April 1987). "Regulation of Cyclic Photophosphorylation during Ferredoxin-Mediated Electron Transport : Effect of DCMU and...

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Bioenergetics

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chloroplast. After glucose is synthesized, the plant cell can undergo photophosphorylation to produce ATP. During energy transformations in living systems,...

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Frederick Whatley

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1954, Whatley, Mary Belle Allen and Daniel Israel Arnon discovered photophosphorylation in vitro. In 1967 he was nominated jointly (but unsuccessfully) with...

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