| prov:value
| - Examples of receptors include, but are not limited to, a polyclonal antibody, a monoclonal antibody, a single chain antibody (scFv), a Fab fragment, a F(ab???)2 fragment, a Fv fragment, antisera reactive with specific antigenic determinants (such as on viruses, cells or other materials), an agonist for a cell membrane receptor, an antagonist for a cell membrane receptor, a toxin, a hormone, a horm
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