Affinity Labels

**Definition:** Analogs of those substrates or compounds which bind naturally at the active sites of proteins, enzymes, antibodies, steroids, or physiological receptors. These analogs form a stable covalent bond at the binding site, thereby acting as inhibitors of the proteins or steroids.

**Tree numbers:** - D27.720.470.410.080

**Synonyms:** - Affinity Labeling Reagents