Detoxification enzyme (EC 3.3.2.9), located mainly in the endoplasmic reticulum, that hydrolyzes epoxides, converting them to metabolites that can be more rapidly excreted.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 751 (https://doi.org/10.1515/pac-2015-1202)