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Effects of Br− substitution or I− substitution and Cl− or Br− reconstitution on oxygen evolution of a PSII dimer from T. vulcanus. (Left) Effects of Br− or I− substitution on oxygen evolution measured in the presence of respective anions. O, Cl−-containing PSII; □, PSII with Br− substitution; Δ, PSII with I− substitution. (Right) Recovery of oxygen evolution of PSII with I− substitution by Cl− (O) and Br− (□).
