Methods for identifying nucleic acid ligands
First Claim
1. A method for identifying a nucleic acid ligand of a target molecule from a candidate mixture of nucleic acids, the method comprising:
- incubating a candidate mixture of nucleic acids with a plurality of target molecules to form nucleic acid/target molecule complexes, wherein the target molecules are bound to beads; and
eluting the nucleic acids from the complexes that have been loaded onto an HPLC column by applying an HPLC gradient profile, wherein nucleic acids with the greatest affinity for the target molecule elute at an end portion of the gradient profile and nucleic acids with a lesser affinity for the target molecule and nucleic acids with no affinity for the target molecule elute prior to the end portion of the gradient profile, and wherein the gradient profile comprises a linearly increasing concentration of the target molecule and the end portion of the gradient profile comprises a linearly increasing concentration of the target molecule and a linearly increasing concentration of a chaotropic agent.
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Abstract
The present invention generally relates to methods for identifying nucleic acid ligands of a target molecule. In certain embodiments, the invention provides methods for identifying a nucleic acid ligand of a target molecule from a candidate mixture of nucleic acids, including contacting at least one target molecule with a candidate mixture of nucleic acids, in which the nucleic acids have different affinities for the target molecule, and separating in a single step nucleic acids that bind the target molecule with greatest affinity from nucleic acids that bind the target molecule with a lesser affinity and nucleic acids that do not bind the target molecule, thereby identifying the nucleic acid ligand of the target molecule.
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Citations
8 Claims
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1. A method for identifying a nucleic acid ligand of a target molecule from a candidate mixture of nucleic acids, the method comprising:
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incubating a candidate mixture of nucleic acids with a plurality of target molecules to form nucleic acid/target molecule complexes, wherein the target molecules are bound to beads; and eluting the nucleic acids from the complexes that have been loaded onto an HPLC column by applying an HPLC gradient profile, wherein nucleic acids with the greatest affinity for the target molecule elute at an end portion of the gradient profile and nucleic acids with a lesser affinity for the target molecule and nucleic acids with no affinity for the target molecule elute prior to the end portion of the gradient profile, and wherein the gradient profile comprises a linearly increasing concentration of the target molecule and the end portion of the gradient profile comprises a linearly increasing concentration of the target molecule and a linearly increasing concentration of a chaotropic agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification