Abstract:
The methods, apparatus and compositions disclosed herein concern the detection, identification and/or sequencing of biomolecules, such as nucleic acids or proteins. In certain embodiments of the invention, coded probes comprising a probe molecule attached to one or more nanobarcodes may be allowed to bind to one or more target molecules. After binding and separation from unbound coded probes, the bound coded probes may be aligned on a surface and analyzed by scanning probe microscopy. The nanobarcodes may be any molecule or complex that is distinguishable by SPM, such as carbon nanotubes, fullerenes, submicrometer metallic barcodes, nanoparticles or quantum dots. Where the probes are oligonucleotides, adjacent coded probes hybridized to a target nucleic acid may be ligated together before alignment and SPM analysis. Compositions comprising coded probes are also disclosed herein. Systems for biomolecule analysis may comprise an SPM instrument and at least one coded probe attached to a surface.
Abstract:
The present invention provides nano-scale devices, including electronic circuits, using DNA molecules as a support structure. DNA binding proteins are used to mask regions of the DNA as a material, such as a metal is coated onto the DNA. Included in the invention are DNA based transistors, capacitors, inductors and diodes. The present invention also provides methods of making integrated circuits using DNA molecules as a support structure. Methods are also included for making DNA based transistors, capacitors, inductors and diodes.
Abstract:
The invention concerns delivery particles (DP's) for active principles (AP's) based on linear amphiphilic polyamino-acids (PAA's), with &agr;-peptide chains, capable of being spontaneously formed by contacting PAA's with a liquid medium, preferably with water, wherein the hydrophile part of the PAA's is solubilized more than the hydrophobic parts of said PAA's, such that the latter precipitate while being organised in discrete supra-molecular arrangements, of average size ranging between 0.01 and 20 &mgr;m, capable of combining with at least an AP and releasing the latter in vivo, in prolonged and controlled manner. The inventive suspension is characterised in that the recurrent amino acids (rAA's) constituting the main chain of PAA's are identical to or different from one another and are glutamic acid and/or aspartic acid and/or their salts; and some of said rAA's bear at least one hydrophobic group, said hydrophobic group, being identical to or different from one another. The invention is useful as carriers for active principles, in particular pharmaceutical, insulin or for therapeutic uses.
Abstract:
The invention relates to a pentopyranosylnucleoside of the formula (I) or of the formula (II) their preparation and use for the production of a therapeutic, diagnostic and/or electronic component.
Abstract:
An aqueous composition containing primers for opposing strands of two or more target nucleic acids can be used in polymerase chain reaction to provide simultaneously rapid and efficient amplification and detection of those nucleic acids. The primers for each target DNA differ in length by no more than 5 nucleotides and have a T.sub.m within the range of from about 65.degree. to about 74.degree. C., while the T.sub.m 's are within about 5.degree. C. of each other. Such compositions are useful in diagnostic test kits and methods for amplification and detection of multiple nucleic acids, or in "multiplexing", using multiple capture probes. All of the capture probes have T.sub.m 's which are greater than 50.degree. C. and are within 15.degree. C. of each other.
Abstract:
The present invention relates to a polymer according to Formulas (1) or (2): The present invention further relates to nanogels and nanoparticles made of a polymer according to general Formulas (1) and (2). The nanogels may comprise a biologically active component such as siRNA, miRNA, DNA, an (oligo)peptide or a proteins.
Abstract:
The invention includes RNA complexes comprising at least three monomeric units of an RNA molecule, each monomeric unit comprising an RNA polymer having first and second helical domains that have respective first and second binding sites, wherein the first binding sites are adapted to binding to one another and are not adapted to bind to the second binding sites, and the second binding sites are adapted to binding to one another and are not adapted to bind to the first binding sites; such that the at least three monomeric units are adapted to self-assemble by forming pairs of cognate interactions and so as to form the RNA complex in a circular closed complex. The invention also includes derivatives of these complexes including aptamers, and analytical methods and devices using same.
Abstract:
The invention relates to a process for preparing a conjugate that includes a pentopyranosyl nucleic acid and a biomolecule. The process includes the steps of providing a pentopyranosyl nucleic acid having at least two pentopyranosyl nucleotide subunits that are covalently linked between carbon 4 and carbon 2 of their respective pentopyranosyl rings. The pentopyranosyl nucleic acid also has an electrophilic reactive group. A biomolecule having a nucleophilic reactive group is also provided. The electrophilic reactive group of the pentopyranosyl nucleic acid and the nucleophilic reactive group of the biomolecule are reacted to form a covalent bond.
Abstract:
The invention relates to a process for preparing a conjugate that includes a pentopyranosyl nucleic acid and a biomolecule. The process includes the steps of providing a pentopyranosyl nucleic acid having at least two pentopyranosyl nucleotide subunits that are covalently linked between carbon 4 and carbon 2 of their respective pentopyranosyl rings. The pentopyranosyl nucleic acid also has an electrophilic reactive group. A biomolecule having a nucleophilic reactive group is also provided. The electrophilic reactive group of the pentopyranosyl nucleic acid and the nucleophilic reactive group of the biomolecule are reacted to form a covalent bond.
Abstract:
The invention includes RNA complexes comprising at least three monomeric units of an RNA molecule, each monomeric unit comprising an RNA polymer having first and second helical domains that have respective first and second binding sites, wherein the first binding sites are adapted to binding to one another and are not adapted to bind to the second binding sites, and the second binding sites are adapted to binding to one another and are not adapted to bind to the first binding sites; such that the at least three monomeric units are adapted to self-assemble by forming pairs of cognate interactions and so as to form the RNA complex in a circular closed complex. The invention also includes derivatives of these complexes including aptamers, and analytical methods and devices using same.