Fig. 3.

Estimation of the fast P700⁺ reduction phase in vivo, reflecting predocking of pc to PSI. Signals represent the decay-associated spectrum assigned to rereduction of P700⁺ in the blue region, as measured by pump-probe spectroscopy in vivo. Signals were normalized to the amplitude of the signal at 430 nm, measured 900 ns after illumination. Experimental conditions were the same as in Fig. 2.