Reversible acidic-alkaline transition of the carbon monoxide complex of cytochrome c peroxidase.

Abstract

The Soret absorption band of the ferrous carbon monoxide (CO) complex of cytochrome c peroxidase exhibited a blue shift from 423.7 to 420 nm upon an increase in pH from 6.5 to 8.5. The spectral change was reversible with an isosbestic point at 422 nm. The pH dependence of this spectral change gave a sigmoidal curve fitted well to a theoretical curve of a… (More)

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