NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,032 terms related to cancer and medicine.

cytochrome P450 enzyme system
(SY-tuh-krome ... EN-zime SIS-tem)
A group of enzymes involved in drug metabolism and found in high levels in the liver. These enzymes change many drugs, including anticancer drugs, into less toxic forms that are easier for the body to excrete.