Reports

Picosecond Kinetics of Events Leading to Reaction Center Bacteriochlorophyll Oxidation

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Science  27 Jun 1975:
Vol. 188, Issue 4195, pp. 1301-1304
DOI: 10.1126/science.188.4195.1301

Abstract

A transient absorption spectrum has been measured in Rhodopseudomonas spheroides R26 reaction centers. Its salient features indicate that both the bacteriopheophytin and bacteriochlorophyll chromophores play a role in the excited state. Decay of this state yields a rise time for oxidation of the reaction center complex of about 150 picoseconds.