Fig. 5.
Comparison of pulse Q-band 1H ENDOR spectra of photoaccumulated A·−1 stationary radical anion in PS I isolated from wild type, and the W697FPsaA and W677FPsaB mutants of Synechocystis sp. PCC 6803. Spectra were recorded at different external magnetic field positions: a close to g x (g = 2.0065), b close to g y (g = 2.0046–2.0049) and c close to g z (g = 2.0026) spectral orientations of the quinone. The dotted line indicates the ENDOR signals assigned to the methyl protons in the wild type. Measurements were performed at 80 K