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(A) Laser flash length dependence of O2 yield from intact spinach PS II membranes in the presence of 2 mM FeCN and flash lengths of 30–500 μs. (B–D) Flash length dependence of the Kok (B) miss parameter (α), (C) single-hit parameter (γ), and (D) double-hit parameter (β). Samples were dark-adapted for 4 min. Flash rate = 0.5 Hz. Parameters for the simple Kok model were described previously (40). All data traces in Figs. 1–7 are an average of three samples.
