cytochrome P450 enzyme system
Pronunciation: (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.
Source: NCI Dictionary of Cancer Terms2004-10-25 Date last modified: 2007-03-01