A heme-thiolate enzyme superfamily whose members catalyse diverse oxidative transformations. The name originates from the characteristic approximately 450 nm absorption of the reduced carbon-monoxide-bound form.
A sorghum P450 catalysing conversion of tyrosine toward p-hydroxyphenylacetaldoxime in dhurrin biosynthesis. It has served as a model for photosynthesis-powered heterologous P450 activity.
The highly oxidizing ferryl/porphyrin-radical intermediate used in many P450 oxygenations; its subsequent reactions depend on the substrate and enzyme.

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