An @A00470@ based on the @C01198@ between a @L03424@ and an unlabelled @L03518@ in the reaction with a @RT06841@ binding agent (e.g. @A00384@, @RT06841@, transport protein).
Source: PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2516 [Terms] [Paper]