Abstract:
The present invention provides novel microfluidic devices and methods that are useful for performing high-throughput screening assays and combinatorial chemistry. The device can include a plurality of electrically addressable, channel bearing fluidic modules integrally arranged on a microfabricated substrate such that a continuous channel is provided for flow of immiscible fluids.
Abstract:
Disclosed are methods for nucleic acid amplification wherein nucleic acid templates, beads, and amplification reaction solution are emulsified and the nucleic acid templates are amplified to provide clonal copies of the nucleic acid templates attached to the beads. Also disclosed are kits and apparatuses for performing the methods of the invention.
Abstract:
The claimed invention provides for new sample preparation methods enabling direct sequencing of PCR products using pyrophosphate sequencing techniques. The PCR products may be specific regions of a genome. The techniques provided in this disclosure allows for SNP (single nucleotide polymorphism) detection, classification, and assessment of individual allelic polymorphisms in one individual or a population of individuals. The results may be used for diagnostic and treatment of patients as well as assessment of viral and bacterial population identification.
Abstract:
This invention relates to methods of sequencing DNA. More specifically, this invention relates to methods of sequencing both the sense and antisense strands of DNA through the use of blocked and unblocked sequencing primers. In brief, these methods include the steps of annealing an unblocked primer to a first strand of nucleic acid; annealing a second blocked primer to a second strand of nucleic acid; elongating the nucleic acid along the first strand with a polymerase; terminating the first sequencing primer; deblocking the second primer; and elongating the nucleic acid along the second strand.
Abstract:
The present invention relates to the field of fluid dynamics. More specifically, this invention relates to methods and apparatus for conducting densely packed, independent chemical reactions in parallel in a substantially two-dimensional array. Accordingly, this invention also focuses on the use of this array for applications such as DNA sequencing, most preferably pyrosequencing, and DNA amplification.
Abstract:
Disclosed are nucleic acid probe arrays and methods of identifying and sequencing nucleic acids in a population of nucleic acids using the arrays. The method is preferably performed by annealing a nucleic acid template to an anchor primer attached to a durface of the array. At least one anchor in the array has a sequence complementary to sequences at the 5' and 3' termini of a target nucleic acid.The annealed linear target nucleic acid is circularized using one or two ligation reactions. In one embodiment, one liggation is issued. Annealing of of the linear nucleic acid results in juxtaposition of the 5' and 3' termini of the target nucleic acid on the anchor primer. Addition of a ligase results in circulization of the target nucleic acid. This circularized nucleic acid is a template for extension of the anchor primer in a rolling circle amplification reaction. An extended anchor primer containing multiple copies of a sequence complementary to the circular mucleic acid is also referred to herein as a anchor primer nucleid acid-nucleic acid concatamer. The presence of multiple copies of the complementary sequence facilitates detection of the nucleic acid. Thus, the method provides for a highly sensitive method of detecting a desired nucleic acid attached at a discrete location on the array.
Abstract:
The invention provides a method for identifying a therapeutic agent. The method includes detecting a nucleic acid in a test sample, e.g. cells, cell lines or tissue, which contains a plurality of nucleic acid species, determining if the detected nucleic acid contributes to a disease state and is thus a qualified therapeutic target, and establishing if the qualified therapeutic target plays a role in disease progress and is thus a verified therapeutic candidate that can function as a therapeutic agent.
Abstract:
Disclosed are nucleic acid probe arrays and methods of identifying and sequencing nucleic acids in a population of nucleic acids using the arrays. The method is preferably performed by annealing a nucleic acid template to an anchor primer attached to a durface of the array. At least one anchor in the array has a sequence complementary to sequences at the 5' and 3' termini of a target nucleic acid.The annealed linear target nucleic acid is circularized using one or two ligation reactions. In one embodiment, one liggation is issued. Annealing of of the linear nucleic acid results in juxtaposition of the 5' and 3' termini of the target nucleic acid on the anchor primer. Addition of a ligase results in circulization of the target nucleic acid. This circularized nucleic acid is a template for extension of the anchor primer in a rolling circle amplification reaction. An extended anchor primer containing multiple copies of a sequence complementary to the circular mucleic acid is also referred to herein as a anchor primer nucleid acid-nucleic acid concatamer. The presence of multiple copies of the complementary sequence facilitates detection of the nucleic acid. Thus, the method provides for a highly sensitive method of detecting a desired nucleic acid attached at a discrete location on the array.
Abstract:
Disclosed are nucleic acid probe arrays and methods of identifying and sequencing nucleic acids in a population of nucleic acids using the arrays.