Picosecond kinetics in reaction centers of Rps. sphaeroides and the effects of ubiquinone extraction and reconstitution. Academic Article uri icon


  • Following picosecond light activation, the bacteriochlorophyll and bacteriopheophytin complement of Rps. sphaeroides reaction centers depleted of ubiquinone behaves as though it has no primary electron acceptor; the excited intermediary BChl BPh state formed in <10 ps lasts >1 ns. Addition of ubiquinone-10 reconstitutes the very rapid electron transfer rates from the excited intermediary BCh BPh state to ubiquinone; the kinetics and rate are similar to that encountered in the untreated reaction centers. Interpretation of the data presented suggests that ubiquinone is the immediate electron acceptor from BPh{minus sign, dot below}. This is consistent with the model for the primary reactions leading to [(BChl)2{plus sign, dot below}BPh]Q{minus sign, dot below}. 1976.

published proceedings

  • Biochem Biophys Res Commun

author list (cited authors)

  • Kaufmann, K. J., Petty, K. M., Dutton, P. L., & Rentzepis, P. M.

citation count

  • 84

complete list of authors

  • Kaufmann, KJ||Petty, KM||Dutton, PL||Rentzepis, PM

publication date

  • June 1976