phase II reaction

of biotransformation
https://doi.org/10.1351/goldbook.PT06837
Binding of a substance, or its @M03859@ from a phase I reaction, with endogenous molecules (@C01267@), making more water-soluble derivatives that may be excreted in the urine or bile.
Source:
PAC, 2004, 76, 1033. (Glossary of terms used in toxicokinetics (IUPAC Recommendations 2003)) on page 1064 [Terms] [Paper]