A small molecule which increases (
activator) or decreases (
inhibitor) the activity of an (allosteric) protein by binding to the protein at the regulatory site (which is different from the substrate-binding catalytic site).
Source: PAC, 1992,
64, 143. (
Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 152 [
Terms] [
Paper]