| http://www.w3.org/ns/prov#value | - Examples of anti-ligands which can be employed by this 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, cellular membranes, and or
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