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Determination of the range of reorganization energies for a→a3 ET. (A) temperature dependence of the forward heme a→a3 rate constant (circles) fitted with a straight line (solid line). Thin lines represent extreme values tolerated. The range within these values corresponds to 0.76 < kf(305 K)/kf(275 K) < 1.03. (B) Calculated kf(305 K)/kf(275 K) as a function of λ and 
as described in the text. The experimentally allowed upper value of 1.03 as determined in A is shown as a dotted line.
