Figure 7.

Yields of P700^+• photoaccumulation upon selective far-red excitation in PS I trimers from T. elongatus (a) and PS I monomers and trimers from A. platensis (b) detected by EPR at 30 K divided by the maximum yield obtained with white light illumination as a function of the duration of excitation. The solid lines are the result of a biexponential fit. In a control experiment (785 nm control), an interference filter (F34-786 from AHF Analysentechnik) was placed directly in front of the resonator.