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. Author manuscript; available in PMC: 2008 Dec 25.
Published in final edited form as: Biochemistry. 2007 Nov 29;46(51):14795–14809. doi: 10.1021/bi7017128

Table 1.

Formation and Decay Rate Constants of the Mixed-Valent Diiron(III,IV)-W• Species Measured by Optical, Mössbauer, and EPR Spectroscopy

Rate Constant Optical Mössbauer EPR
kf (s−1) 0.804 (1) 1.1 0.77
kd (s−1) 0.054 (2) 0.08 0.15