Immobilization of biomolecules on substrates by attaching them to adsorbed bridging biomolecules

摘要

An assay article for detection first biomolecules contained in a sample is described. The assay article includes a substrate having a modified surface and a first biomolecule directly adsorbed and immobilized on the modified surface of the substrate without linking moieties. A second biomolecule is bound to or adsorbed on the first biomolecule. Also disclosed is a method of making the assay article. A first biomolecule (other than an adhesive protein) is contacted with a modified surface of a substrate. The substrate is dried to directly adsorb the first biomolecule and immobilize it on the modified surface of the substrate without additional fixing steps to form an activated substrate. Then, a second biomolecule is contacted with the activated substrate under conditions sufficient for the first biomolecule to bind the second biomolecule.