Biomolecule/polymer conjugates
View Patent ↗The present invention is directed to methods for immobilizing natural or synthetic biomolecules to surfaces. The methods comprise covalently linking the natural or synthetic biomolecule to a mono- or bi-functional polymer and covalently and/or electrostatically immobilizing the biomolecule/polymer conjugate to an unmodified or modified surface. The biomolecule is an oligonucleotide, a polynucleotide, a protein, a glycoprotein, a peptide or a carbohydrate that has been modified to incorporate a single or plurality of nucleophilic groups. These groups comprise an aliphatic or aromatic amino, thiol, hydrazine, thiosemicarbazide, hydrazide, thiocarbazide, carbazide, aminooxy, a derivative of 2-hydrazinopyridine or aminoxyacetic acid or a single or plurality of electrophilic groups. The electrophilic groups comprise an aliphatic or aromatic aldehyde, ketone, epoxide, isocyanate, isothiocyanate, succinimidyl ester or cyanuric chloride or a linkable aromatic aldehyde or ketone. The surface has been modified to possess either neutral, cationic or anionic groups or a combination neutral, anionic and/or cationic moieties.
1. A biomolecule/polymer conjugate wherein said biomolecule is conjugated to said polymer by a hydrazone bond, wherein said biomolecule is a protein, a glycoprotein or a peptide and wherein said polymer is a poly-L-lysine, poly-L-ornithine or polyethyleneimine.
2. A biomolecule/polymer conjugate wherein said biomolecule is conjugated to said polymer by a oxime bond, wherein said biomolecule is a protein, a glycoprotein or a peptide and wherein said polymer is a poly-L-lysine, poly-L-ornithine or polyethyleneimine.