allosteric enzymes
@E02159@ which contain regions to which small, regulatory molecules (cf. @E01901@) may bind in addition to and separate from @S06083@ binding sites. On binding the @E01901@, the catalytic activity of the enzyme towards the substrate may be enhanced, in which case the @E01901@ is an @A00104@, or reduced, in which case it is an @I03035@.
PAC, 1992, 64, 143. (Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 146 [Terms] [Paper]