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Home >Information for Patients > Dictionary Index

Dictionary of Cancer Terms

View in Spanish: Reactivo de unión

Affinity reagent (uh-FIH-nih-tee ree-AY-jent)
In chemistry and biology, a compound that binds specific substances, such as proteins or nucleic acids. Many affinity reagents are antibodies. They are used to analyze tissue samples to help diagnose diseases.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.