metalloenzyme

https://doi.org/10.1351/goldbook.MT06765
An enzyme that, in the active state, contains one or more metal ions which are essential for its biological function.
Source:
PAC, 1997, 69, 1251. 'Glossary of terms used in bioinorganic chemistry (IUPAC Recommendations 1997)' on page 1284 (https://doi.org/10.1351/pac199769061251)