Molecular structure in or on a cell that specifically recognizes and
binds to a compound and acts as a physiological signal
transducer, or
mediator of, an effect.
Source:
PAC, 2004, 76, 1033
(Glossary of terms used in toxicokinetics (IUPAC Recommendations 2003))
on page 1067
This definition replaces an earlier definition of receptor.