摘要:
A polyelectrolyte having multiple exposed functional groups, each such group being capable of covalently bonding to a molecule, is immobilized on a surface for the purpose of bonding to a biomolecule. The biomolecule can be, for example, a nucleic acid, e.g., an amine functionalized oligonucleotide. The polyelectrolyte can include, e.g., BSA (Bovine Serum Albumin) which is bound to a functionalized surface using a covalent immobilization strategy, e.g., reaction with the surface of a tosyl-activated microparticle. Following such reaction, exposed reactive functional groups on the protein, such as amine, carboxyl, thiol, hydroxyl groups can further be utilized to covalently couple the oligonucleotide of interest using suitable chemistry.
摘要:
The application is directed to a substantially planar substrate and a chip disposed thereon, which together form part of biological assay system. The substrate further comprises several discrete hydrophilic regions which are part of a planar surface of the substrate. The hydrophilic regions are separated from other hydrophilic regions by a hydrophobic region which is also part of said planar surface. In this way, the hydrophilic regions are designed to accommodate the chip disposed thereon, since the chip has a hydrophilic surface which faces said planar surface when the chip is disposed on the substrate. On the opposing surface of the chip is deposited an array of particles, whereby a biological reagent or binding ligand is bound to the particles.
摘要:
A planar array of beads in a spatially non-random configuration, said array comprising a plurality of different particle types, wherein each of said particle types has a different ligand attached thereto for forming a complex with an analyte, and wherein said particle types are encoded with a chemical or physical characteristic that uniquely identifies the ligand of said particle type, and wherein said array of particle is configured such that when said array of particles is contacted with liquid comprising an analyte, the particles of said array in a contiguous liquid phase.
摘要:
An array of several different particle-attached ligands, wherein different ligands are attached to different particles and said particles have a chemical or physical characteristic that permits identification of the ligand or ligands attached thereto, and wherein said particles are in a planar defined area on the surface of a substrate but are randomly-positioned with respect to different particle types, and wherein said particles are affixed to said surface of said substrate.
摘要:
Disclosed are methods of processing images, and in particular aligning and orienting grids from a fluorescent array of signal sources, by linking nearest neighbor sources to form a hexagon, and then using the hexagon lines for alignment and orientation of the grid. Also disclosed are methods and algorithms for aligning image with grid and correcting for signal beads which are smaller than a grid field and the shift in a grid field. These methods can be used where the signal sources are fluorescent images from a microarray. Also disclosed are methods of automated watershed clustering following transformation.
摘要:
Disclosed is a method of performing simulltaneous PCR amplification of several designated different loci in a sample each including a different target subsequence, using a set of pairs of forward and reverse primers, wherein the pairs are complementary to target subsequences, where different primer pairs are in different reaction chambers and the sample is also present in the reaction chambers, and wherein different primer pairs have different sequences. Different reaction chambers are provided different annealing temperatures, preferably at the same time, such that the annealing temperatures selected enhance annealing conditions for the primer pairs and the target subsequences within the reaction chambers. The method allows PCR to proceed more quickly, which is important to increase throughput in a multiplexed assay, and can be particularly important for HLA-typing in a transplantation setting.
摘要:
A planar array of beads in a spatially non-random configuration, said array comprising a plurality of different particle types, wherein each of said particle types has a different ligand attached thereto for forming a complex with an analyte, and wherein said particle types are encoded with a chemical or physical characteristic that uniquely identifies the ligand of said particle type, and wherein said array of particle is configured such that when said array of particles is contacted with liquid comprising an analyte, the particles of said array are in a contiguous liquid phase.
摘要:
A method of detecting the formation of an analyte-biomolecule complex comprising the following steps: providing a planar array of biomolecules comprising a plurality of beads having biomolecules attached thereto, wherein the plurality of beads comprises different bead types, said bead types being distinguishable by said biomolecules and each bead type being associated with a unique chemical or physical characteristic that identifies the biomolecules attached to said bead type, wherein beads are arranged in a planar array and biomolecules attached to said beads are exposed to a contiguous liquid phase, said biomolecules capable of forming complexes with corresponding analyte compounds, when said analyte compounds are present in said liquid phase; contacting the biomolecules with a sample that may contain one or more analyte compounds such that, if the analytes are present in the sample, said analytes bind to corresponding biomolecules to form analyte-biomolecule complexes; detecting the formation of the analyte-biomolecule complexes; and identifying the biomolecules of the analyte-biomolecule complexes by correlating the location of the analyte-biomolecule complexes with particular bead types, based on the unique chemical or physical characteristics of the beads.
摘要:
Disclosed are gel-coated beads (including HydrogelTM -coated beads), which are capable of adsorbing, or absorbing, proteins and other biomolecules onto or into the gel coating. The gelcoated beads with absorbed or adsorbed biomolecules are suitable for use in an assays, purification or other purposes. The beads have a core made from any of a number of materials, including latex, coated with the gel shell. The biomolecules can be retained within the gel, following adsorption, by covalent attachment, or, by selection of conditions of ambient pH and/or ionic strength such that they are retained without further reaction. Therefore, adsorbed proteins would retain the ability to bind to their respective ligands.
摘要:
Solute-loaded polymer microparticles are obtained by immersing microparticles in a bath comprising a selected solute dissolved in a ternary solvent system. A first solvent of the ternary system is a strong solvent for both the solute and the polymer from which the microparticle was formed. A second solvent is a weak solvent or non- solvent for the solute and the polymer (tuning solvent). A third solvent is a weak solvent or non-solvent for the solute and polymer, but serves as a co-solvent with respect to the first and second solvents in that it is miscible with both the first and second solvents. The amount of solute incorporated into the microparticles is controlled by adjusting the ratio of solute with respect to the microparticle polymer, and by adjusting the composition of the ternary solvent system, principally the amount of tuning solvent. The method is particularly useful for providing libraries of combinatorially encoded microparticles containing distinguishable dye loadings, particularly distinguishable fluorescent dye loadings.