A. Pokorny et al., AN ELECTROGENIC REACTION ASSOCIATED WITH THE REREDUCTION OF P680 BY TYR-Z IN PHOTOSYSTEM-II, Biochimica et biophysica acta. Bioenergetics, 1184(1), 1994, pp. 65-70
The location of tyrosine Z (D1 Tyr-161), the immediate donor to photoo
xidized P680, has been probed using a fast photovoltage technique. We
found an electrogenic reaction with an amplitude of 16% of the charge
separated state P680(+)Q(A)(-) and a time constant of 29 ns which is a
ttributed to the electron transfer between Tyr Z and P680. The result
is discussed in the light of current structural models.