| http://www.w3.org/ns/prov#value | - By way of example of ligand, there may be mentioned antibodies, antibody fragments, antigens, haptens, lectins, sugars, ribo- and deoxyribonucleic acids, proteins, in particular A or G, hormones, hormone receptors, biotin, avidin or strepta-,idin and, in general, it being possible for natural or synthetic ligands, and modified ligand analogues to enter into competition with the ligands.
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