constitutive enzymes

https://doi.org/10.1351/goldbook.C01289
@E02159@ which are produced constitutively by the cell under all physiological conditions. Therefore, they are not controlled by @I03018@ or @R05304@.
Source:
PAC, 1992, 64, 143. (Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 150 [Terms] [Paper]