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Methods of producing nucleic acid ligands

  • US 7,368,236 B2
  • Filed: 04/06/2004
  • Issued: 05/06/2008
  • Est. Priority Date: 06/11/1990
  • Status: Expired due to Fees
First Claim
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1. A method for modifying a nucleic acid ligand for a given target so that the modified ligand has at least one of the following improved properties:

  • decreased size;

    improved stability;

    improved binding to the target;

    modification of biological activity of the target;

    resistance to clearance;

    wherein said modifying comprises adding, removing or substituting nucleotide residues, wherein said residues may be chemically modified, and/or chemically modifying said nucleic acid ligand based on;

    (a) determining which nucleotides are crucial to the interaction with the target molecule;

    (b) chemical modification experiments;

    or(c) determining the structural conformation of said nucleic acid ligand; and

    (d) modifying said ligand based on said determinations made in steps a) through c).

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