B-side charge separation in bacterial photosynthetic reaction centers: nanosecond time scale electron transfer from H(sub)B(sup)- to Q(sub)

Direct excitation of the bacteriochlorophyll dimer (P) induced electron transfer to the B-side bacteriochlorophytin yields 30% of P(sup)+H(sub)B and decays with a time constant of 1.5-3 nanoseconds when the secondary quinone Q(sub)B site is occupied.