• Corpus ID: 14473995

Photosystems I and II March 17 , 2003

@inproceedings{Miles2003PhotosystemsIA,
  title={Photosystems I and II March 17 , 2003},
  author={Bryant W. Miles},
  year={2003}
}
Within the thylakoid membranes of the chloroplast, are two photosystems. Photosystem I optimally absorbs photons of a wavelength of 700 nm. Photosystem II optimally absorbs photons of a wavelength of 680 nm. The numbers indicate the order in which the photosystems were discovered, not the order of electron transfer. Under normal conditions electrons flow from PSII through cytochrome bf (a membrane bound protein analogous to Complex III of the mitochondrial electron transport chain) to PSI.