photosystem I


photosystem I
The photosystem in eucaryotic cells that absorbs longer wavelength light, usually greater than about 680 nm, and transfers the energy to chlorophyll P700 during photosynthesis; it is involved in both cyclic photophosphorylation and noncyclic photophosphorylation.

Microbiology. . 2009.

Look at other dictionaries:

  • Photosystem II — is the first protein complex in Light Dependent Photosynthesis. It is located in the thylakoid membrane of plants, algae and cyanobacteria. The enzyme uses photons of light to energize electrons which are then transferred through a variety of… …   Wikipedia

  • Photosystem — Photosystems (ancient Greek: phos = light and systema = assembly) are protein complexes involved in photosynthesis. They are found in the thylakoid membranes of plants, algae and cyanobacteria (in plants and algae these are located in the… …   Wikipedia

  • Photosystem — Übergeordnet Thylakoid Untergeordnet Photosystem I Photosystem II …   Deutsch Wikipedia

  • Photosystem II — Übergeordnet Photosystem Untergeordnet Photosystem II Reaktionszentrum Lichtsammelkomplex II …   Deutsch Wikipedia

  • photosystem — noun Date: 1964 either of two photochemical reaction centers consisting chiefly of photosynthetic pigments complexed with protein and occurring in chloroplasts: a. one that absorbs light with a wavelength of about 700 nanometers called also… …   New Collegiate Dictionary

  • photosystem — ˈtü noun Etymology: phot + system : either of two photochemical reaction centers occurring in chloroplasts that consist chiefly of photosynthetic pigments (as chlorophyll) complexed with protein which absorb light energy and convert it to… …   Useful english dictionary

  • photosystem I — noun see photosystem …   New Collegiate Dictionary

  • photosystem II — noun see photosystem …   New Collegiate Dictionary

  • photosystem II — The photosystem in eucaryotic cells that absorbs shorter wavelength light, usually less than 680 nm, and transfers the energy to chlorophyll P680 during photosynthesis; it participates in noncyclic photophosphorylation …   Dictionary of microbiology

  • photosystem II — Photosynthetic system in chloroplasts in which light of up to 680nm is absorbed and its energy used to split water molecules, giving rise to a high energy reductant, Q , and oxygen. The reductant is the starting point for an electron transport… …   Dictionary of molecular biology


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