Abstract: Methods for covalent attachment of oligonucleotides to solid supports such that substantially all of the oligonucleotides are attached via their 5'-ends are provided. The solid supports with attached oligonucleotides are produced. Thiol-oligonucleotides are attached to bromoacetyl-derivatized polyacrylamide supports, or conversely, bromoacetyl-oligonucleotides are immobilized on thiol-polyacrylamide supports. In a further aspect, bromoacetyl-derivatized oligonucleotides, and polyacrylamide supports with linked oligonucleotides produced by coupling bromoacetyl-derivatized oligonucleotides with thiol-derivatized polyacrylamide solid supports or by coupling thiol-derivatized oligonucleotides with bromoacetyl-derivatized polyacrylamide supports as well as methods for capture of nucleic acids by oligonucleotides attached to polyacrylamide solid supports, either by direct capture or in sandwich hybridization formats are provided.

Abstract: Methods for covalent attachment of oligonucleotides to solid supports such that substantially all of the oligonucleotides are attached via their 5'-ends are provided. The solid supports with attached oligonucleotides are produced. Thiol-oligonucleotides are attached to bromoacetyl-derivatized polyacrylamide supports, or conversely, bromoacetyl-oligonucleotides are immobilized on thiol-polyacrylamide supports. In a further aspect, bromoacetyl-derivatized oligonucleotides, and polyacrylamide supports with linked oligonucleotides produced by coupling bromoacetyl-derivatized oligonucleotides with thiol-derivatized polyacrylamide solid supports or by coupling thiol-derivatized oligonucleotides with bromoacetyl-derivatized polyacrylamide supports as well as methods for capture of nucleic acids by oligonucleotides attached to polyacrylamide solid supports, either by direct capture or in sandwich hybridization formats are provided.

Abstract: Methods for the detection of nucleic acid using sandwich hybridization are provided. The target nucleic acids are captured by hybridization with oligonucleotides covalently attached to polystyrene solid supports to form complexes which are then hybridized to detection oligonucleotides to facilitate the analysis of the target nucleic acid sequences.

Abstract: This invention concerns methods and means for covalent attachment of oligonucleotides to solid supports substantially at their 5'-ends. According to the invention thiol-oligonucleotides are attached to bromoacetyl-derivatized polyacrylamide supports, or conversely, bromoacetyl-oligonucleotides are immobilized on thiol-polyacrylamide supports.In a further aspect, this invention relates to bromoacetyl-oligonucleotides that may be immobilized on thiol-polyacrylamide solid supports, thiol-oligonucleotides immobilized on bromoacetyl-derivatized polyacrylamide supports as well as to methods for capture of nucleic acids by oligonucleotides attached to polyacrylamide solid supports, either by direct capture or in sandwich hybridization formats.

Abstract: Nucleic acid hybridization probes are provided which comprise an N.sup.4 -(substituted amino)cytosine moiety, wherein the substituted amino group comprises a tag moiety, whereby the probe is detected. Methods of preparing probes of the invention, intermediates used in such methods, and methods of using the probes of the invention in hybridization assays are also provided. Typical tag moieties employed with the probes of the invention are biotinyl, aminothiadiazole and fluorescein derivatives, connected to N.sup.4 -amino groups of modified cytosines of the probe through linker moieties. Probes tagged with biotin are typically detected by binding to the biotinyl moieties, through a streptavidin or avidin molecule, a reporter group which includes streptavidin or avidin and then detecting a signal due to the reporter group.

Abstract: Fluorescent linker moieties are provided which comprise a fluorescent compound such as fluorescein attached to a linker moiety such that a functional group of the linker is available for attachment to an affinity molecule such as a nucleic acid which has an N.sup.4 (substituted amino) cytosine moiety. Probes tagged with fluorescent derivatives such as fluorescein, tetramethyrhodamine or tetraethylrhodamine may be detected by fluorescence spectroscopic methods.

Abstract: Nucleic acid hybridization probes are provided which comprise an N.sup.4 -(substituted amino)cytosine moiety, wherein the substituted amino group comprises a tag moiety, whereby the probe is detected. Methods of preparing probes of the invention, intermediates used in such methods, and methods of using the probes of the invention in hybridization assays are also provided. Typical tag moieties employed with the probes of the invention are biotinyl, aminothiadiazole and fluorescein derivatives, connected to N.sup.4 -amino groups of modified cytosines of the probe through linker moieties. Probes tagged with biotin are typically detected by binding to the biotinyl moieties, through a streptavidin or avidin molecule, a reporter group which includes streptavidin or avidin and then detecting a signal due to the reporter group.

Abstract: Nucleic acid hybridization probes are provided which comprise nucleoside bases or terminal nucleotide phosphates chemically linked to aromatic sulfonamide inhibitors of carbonic anhydrase. Methods of preparing probes of the invention, intermediates used in such methods, and methods of using the probes of the invention in hybridization assays are also provided. A probe of the invention is detected by binding to it a reporter group, such as a homopolymer or heteropolymer of enzymes, which includes a carbonic anhydrase which binds to the inhibitor linked to the probe, and then detecting the bound reporter group, as by production of a fluorescent or colored product in a reaction catalyzed by an enzyme component of the reporter group. Also provided are enzyme immunoassays wherein detection of antibody is by a process which comprises a chemical reaction catalyzed by a carbonic anhydrase.