• Photosystem I is an integral membrane protein complex that uses light energy to catalyze the transfer of electrons across the thylakoid membrane from plastocyanin to ferredoxin. (wikipedia.org)
  • Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. (cansar.ai)
  • Louis Duysens first proposed the concepts of Photosystems I and II in 1960, and, in the same year, a proposal by Fay Bendall and Robert Hill assembled earlier discoveries into a coherent theory of serial photosynthetic reactions. (wikipedia.org)
  • A membrane enriched in complexes formed of reaction centers, accessory pigments and electron carriers, in which photosynthetic reactions take place. (e-cyanobacterium.org)
  • Three proteinaceous iron-sulfur reaction centers are found in PSI. (wikipedia.org)
  • A photosystem that contains an iron-sulfur reaction center associated with accessory pigments and electron carriers. (e-cyanobacterium.org)
  • Ferredoxin (Fd) is a soluble protein that facilitates reduction of NADP+ to NADPH. (wikipedia.org)
  • The P700 reaction center is composed of modified chlorophyll a that best absorbs light at a wavelength of 700 nm. (wikipedia.org)
  • PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. (cansar.ai)
  • The energy passed around by antenna molecules is directed to the reaction center. (wikipedia.org)
  • The eukaryotic PSI reaction center is composed of at least 11 subunits. (cansar.ai)
  • Located within the antenna complex of PSI are molecules of chlorophyll called P700 reaction centers. (wikipedia.org)
  • Photosynthesis - Photosynthesis - The process of photosynthesis: carbon fixation and reduction: The assimilation of carbon into organic compounds is the result of a complex series of enzymatically regulated chemical reactions-the dark reactions. (e-wit.pl)