| http://www.w3.org/ns/prov#value | - Examples of anti-ligands that can be employed in the practice of the present invention include, but are not restricted to, cell membrane receptors, monoclonal antibodies and antisera reactive with specific antigenic determinants (such as on viruses, cells, or other materials), hormones, drugs, oligonucleotides, peptides, enzymes, substrates, cofactors, lectins, sugars, oligosaccharides, cells, cel
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