affinity reagent
noun1
Biochemistry, Biology, Chemistry, Microbiology, Natural sciences, Physical sciences An antibody, peptide, nucleic acid, or other small molecule that specifically binds to a larger target molecule in order to identify, track, capture, or influence its activity.
- Finally, the recovery of the target protein should be attempted by washing with a suitable eluant so that the target protein dissociates from the affinity reagent.1994, G. Street, chapter 2, in Highly selective separations in biotechnology, →ISBN, page 10: