By use of nuclear relaxation time measurements of the water proton, it is demonstrated unambiguously that water is not coordinated to the haem iron in BrCN-modified myoglobin; by stopped-flow measurements it is also shown that the rate of formation of compound I in the modified Mb is very similar to that in horseradish peroxidase, having similar coordination geometry.
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Modi et al. (1991) studied this question.
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