phase II detoxification

Definition of phase II detoxification
National Cancer Institute

phase II detoxification

(fayz ... dee-TOK-sih-fih-KAY-shun)
A process in which the liver uses one of two major enzyme pathways to change a toxic substance, such as an anticancer drug, into a less toxic substance that is easier for the body to excrete. In phase II detoxification, liver cells add a substance (such as cysteine, glycine, or a sulfur molecule) to a toxic chemical or drug, to make it less harmful.

Source: NCI Dictionary of Cancer Terms