radioactive marker

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Related to Isotopic labeling: radiolabeled

radioactive marker

A compound containing a radio-isotope atom whose movement through a chemical reaction can be monitored by virtue of the radiation emitted.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
Isotopic labeling is one referenced technique for the quantification of any compound, as it uses a known amount of stable isotopically substituted analog to a sample [4].
In addition to isotopic labeling, enzyme labeled immunoassays and such new technologies as fluorescence polarization immunoassay have become available to laboratorians.
The final problem in the development of a CCK RIA has been difficulty with isotopic labeling of the peptide.