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Cytochromes P450 catalyze the insertion of one O2-derived oxygen atom into an aliphatic or aromatic molecule. P450s are best known for the metabolism of xenobiotic molecules, where hydroxylation renders insoluble hydrocarbons more soluble for easier elimination. In addition to this important catabolic function, P450s catalyze key steps in steroid and plant growth regulator metabolism. A variety of...
Resonance Raman spectra are reported for native horseradish peroxidase (HRP) and cytochrome c peroxidase (CCP) at 290, 77 and 9 K, using 406.7 nm excitation, in resonance with the Soret electronic transition. The spectra reveal temperature-dependent equilibria involving changes in coordination or spin state. At 290 K and pH 6.5, CCP contains a mixture of 5- and 6-coordinate high-spin Fe I ...
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