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Room temperature, light induced (P700+-P700) Fourier transform infrared (FTIR) difference spectra have been obtained using photosystem I (PS I) particles from Synechocystis sp. PCC 6803 that are unlabeled, uniformly 2H labeled, and uniformly 15N labeled. Spectra were also obtained for PS I particles that had been extensively washed and incubated in D2O. Previously, we have found that extensive washing...
Fourier transform infrared spectroscopy (FTIR) difference spectroscopy in combination with deuterium exchange experiments has been used to study the photo-oxidation of P740, the primary electron donor in photosystem I from Acaryochloris marina. Comparison of (P740+-P740) and (P700+-P700) FTIR difference spectra show that P700 and P740 share many structural similarities. However, there are several...
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