Abstract
Recent data show that besides the well-known long-term regulation of cytochrome P450-dependent monooxygenase activity by induction there also exists a fast regulation by phosphorylation. This phosphorylation occurs when purified cytochromes P450 are combined with purified protein kinases, and also in intact cells. This process is donor- and acceptor-selective leading to phosphorylation of defined isoenzymes by defined protein kinases. This in turn leads to fast and marked changes in metabolism which are selective for given substrates and regio- and stereo-selective for given positions. This in turn is selectively and differentially influenced by the individual control of the protein kinase in question.
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