Method and reagent composition for covalent attachment of target molecules, such as nucleic acids, onto the surface of a substrate. The reagent composition includes epoxide groups capable of covalently binding to the target molecule. Optionally, the composition can contain photoreactive groups for u
Method and reagent composition for covalent attachment of target molecules, such as nucleic acids, onto the surface of a substrate. The reagent composition includes epoxide groups capable of covalently binding to the target molecule. Optionally, the composition can contain photoreactive groups for use in attaching the reagent composition to the surface. The reagent composition can be used to provide activated slides for use in preparing microarrays of nucleic acids.
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1. A reagent composition for attaching a target molecule to the surface of a substrate, the reagent composition comprising a copolymer formed by reacting a mixture comprising:(a) one or more monomers having pendant epoxy group in an amount of 5 to 25 mole percent based on the weight of the copolymer
1. A reagent composition for attaching a target molecule to the surface of a substrate, the reagent composition comprising a copolymer formed by reacting a mixture comprising:(a) one or more monomers having pendant epoxy group in an amount of 5 to 25 mole percent based on the weight of the copolymer;(b) one or more diluent monomers or polymers, wherein the diluent monomers or polymers comprise acrylics, vinyls, nylons, polyurethanes, or polyethers; and(c) one or more monomers having a photoreactive group in an amount of 0.1 to 5 mole percent based on the weight of the copolymer,wherein the photoreactive group can form a covalent bond with the surface of the substrate to attach the copolymer to the substrate and the epoxy group can form a covalent bond with the target molecule. 2. The reagent composition of claim 1, wherein the diluent monomer is an acrylamide or a vinyl pyrrolidone. 3. The reagent composition of claim 1, wherein the photoreactive group is an aryl ketone. 4. A reagent composition for attaching a target molecule to the surface of a substrate, the reagent composition comprising a polymer having one or more pendant epoxy groups, the polymer formed by reacting a mixture comprising:(a) hydroxyl- or amine-containing polymer; and(b) diepoxide;wherein the polymer can be attached to the surface of the substrate by formation of a covalent bond and the epoxy group can form a covalent bond with the target molecule. 5. The reagent composition of claim 4, wherein the polymer comprising one or more pendant epoxy groups is a copolymer. 6. The reagent composition of claim 4, wherein the hydroxyl or amine containing polymer is a copolymer. 7. The reagent composition of claim 4, wherein the diepoxide comprises butanedioldiglycidyl ether, ethylene glycol digylcidyl ether, diepoxyoctane, or diepoxydecane. 8. The reagent composition of claim 4, wherein the target molecule comprises a nucleic acid and the surface comprises the surface of a support formed of organosilane-pretreated glass, organosilane-pretreated silicon, silicon hydride, or plastic. 9. The reagent composition of claim 8, wherein the nucleic acid comprises an underivatized nucleic acid. 10. The reagent composition of claim 9, wherein the underivatized nucleic acid comprises an oligonucleotide. 11. The reagent composition of claim 4, wherein the composition further comprises one or more photoreactive groups for covalently attaching the reagent composition to the surface upon application of energy from a suitable source. 12. The reagent composition of claim 11, wherein the target molecule is a nucleic acid and the one or more photoreactive groups comprise photoreactive aryl ketone. 13. A reagent composition for attaching a nucleic acid molecule to the surface of a substrate, the reagent composition comprising a copolymer having one or more pendant epoxy groups, the copolymer formed by reacting a mixture comprising:(a) one or more monomers having pendant epoxy group;(b) one or more diluent monomers or polymers, wherein the diluent monomers or polymers comprise acrylics, vinyls, nylons, polyurethanes, or polyethers; and(c) one or more monomers comprising one or more photoreactive aryl ketones;wherein the copolymer can be attached to the surface of the substrate by formation of a covalent bond and the epoxy group can form a covalent bond with the nucleic acid molecule. 14. The reagent composition of claim 13, wherein the monomer comprising a pendant epoxide group comprises glycidyl acrylate, glycidyl methacrylate, allylglycidyl ether, or glycidyl vinyl ether. 15. The reagent composition of claim 13, wherein the monomer having a pendant epoxide group is of the formula:where R 1 is either CH 3 or H and X is a radical of the formula:where m=2−6 and n=1−10;where n=1−10 2 ) m —O—(CH 2 )—where m=0 or 1; orwhere m=1−20 and n=1−10. 16. The reagent composition of claim 13, wherein the surface comprises the surface of a su pport formed of organosilane-pretreated glass, organosilane-pretreated silicon, silicon hydride, or plastic. 17. The reagent composition of claim 13, wherein the nucleic acid comprises an underivatized nucleic acid. 18. The reagent composition of claim 17, wherein the underivatized nucleic acid comprises an oligonucleotide. 19. A reagent composition for attaching a target molecule to the surface of a substrate, the reagent composition comprising a copolymer formed by reacting a mixture comprising:(a) one or more monomers having pendant epoxy group in an amount of 5 to 25 mole percent based on the weight of the copolymer;(b) one or more diluent monomers, the one or more diluent monomers being an acrylamide or a vinyl pyrrolidone; and(c) one or more monomers having one or more photoreactive groups in an amount of 0.1 to 5 mole percent based on the weight of the copolymer;wherein the one or more photoreactive groups can form a covalent bond with the surface of the substrate to attach the copolymer to the substrate and the epoxy group can form a covalent bond with the target molecule. 20. The reagent composition of claim 19, wherein the photoreactive group comprises aryl ketone. 21. A reagent composition for attaching a target molecule to the surface of a substrate, the reagent composition comprising a copolymer formed by reacting a mixture comprising:(a) one or more monomers having pendant epoxy group in an amount of 5 to 25 mole percent based on the weight of the copolymer;(b) one or more diluent monomers or polymers, wherein the diluent monomers or polymers comprise acrylics, vinyls, nylons, polyurethanes, or polyethers; and(c) one or more monomers having one or more photoreactive aryl ketones in an amount of 0.1 to 5 mole percent based on the weight of the copolymer;wherein the photoreactive group can form a covalent bond with the surface of the substrate to attach the copolymer to the substrate and the epoxy group can form a covalent bond with the target molecule. 22. The reagent composition of claim 21, wherein the diluent monomer is an acrylamide or a vinyl pyrrolidone. 23. A reagent composition for attaching a target molecule to the surface of a substrate, the reagent composition comprising:a copolymer of a mixture of monomers, the monomers comprising:one or more monomers comprising pendant epoxy group;one or more diluent monomers or polymers lacking pendant epoxy group, the one or more diluent monomers or polymers comprising acrylics, vinyls, nylons, polyurethanes, or polyethers; andone or more monomers comprising photoreactive group;wherein the copolymer can be attached to the surface of the substrate by formation of a covalent bond and the epoxy group can form a covalent bond with the target molecule. 24. The reagent composition of claim 23, wherein the monomer comprising pendant epoxide group comprises glycidyl acrylate, glycidyl methacrylate, allylglycidyl ether, or glycidyl vinyl ether. 25. The reagent composition of claim 23, wherein the monomer comprising pendant epoxide group is of the formula:where R 1 is either CH 3 or H and X is a radical of the formula: 2 ) m —O—(CH 2 )—where m=0 or 1; or 26. The reagent composition of claim 23, wherein the target molecule comprises a nucleic acid and the surface comprises the surface of a support formed of organosilane-pretreated glass, organosilane-pretreated silicon, silicon hydride, or plastic. 27. The reagent composition of claim 26, wherein the nucleic acid comprises underivatized nucleic acid. 28. The reagent composition of claim 27, wherein the underivatized nucleic acid comprises oligonucleotide. 29. The reagent composition of claim 23, wherein the target molecule is nucleic acid and the one or more photoreactive groups comprise photoreactive aryl ketone. 30. A reagent composition for attaching a target molecule to the surface of a substrate, the reagent composition comprising a copolymer having one or more pendant epoxy groups, the copolymer formed by reacting a mixture comprising:one or more monomers comprising pendant epoxy group;one or more diluent monomers or polymers lacking pendant epoxy group, wherein the diluent monomers or polymers comprise acrylics, vinyls, nylons, polyurethanes, or polyethers; andone or more monomers comprising photoreactive group;wherein the copolymer can be attached to the surface of the substrate by formation of a covalent bond and the epoxy group can form a covalent bond with the target molecule. 31. The reagent composition of claim 30, wherein the monomer having a pendant epoxide group comprises glycidyl acrylate, glycidyl methacrylate, allylglycidyl ether, or glycidyl vinyl ether. 32. The reagent composition of claim 30, wherein the monomer having a pendant epoxide group is of the formula:where R 1 is either CH 3 or H and X is a radical of the formula: 2 ) m —O—(CH 2 )—where m=0 or 1; or 33. The reagent composition of claim 30, wherein the reagent composition comprises a polymer synthesized by reacting hydroxyl- or amine-containing polymers with diepoxides. 34. The reagent composition of claim 30, wherein the target molecule comprises a nucleic acid and the surface comprises the surface of a support formed of organosilane-pretreated glass, organosilane-pretreated silicon, silicon hydride, or plastic. 35. The reagent composition of claim 34, wherein the nucleic acid comprises an underivatized nucleic acid. 36. The reagent composition of claim 35, wherein the underivatized nucleic acid comprises an oligonucleotide. 37. The reagent composition of claim 30, wherein the target molecule is a nucleic acid and the one or more photoreactive groups comprise photoreactive aryl ketone.
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