摘要:
Miniaturized, high-density, bead-based arrays are provided. Methods of producing and using clonal beads and producing and using miniaturized, high density, bead-based arrays are also provided.
摘要:
A method for sequencing a nucleic acid polymer by (1) providing two separate, adjacent pools of a medium and an interface between the two pools, the interface having a channel so dimensioned as to allow sequential monomer-by-monomer passage from one pool to the other pool of only one nucleic acid polymer at a time; (2) placing the nucleic acid polymer to be sequenced in one of the two pools; and (3) taking measurements as each of the nucleotide monomers of the nucleic acid polymer passes through the channel so as to sequence the nucleic acid polymer.
摘要:
Compositions and methods for production of fatty alcohols using recombinant microorganisms are provided as well as fatty alcohol compositions produced by such methods.
摘要:
Genetically engineered microorganisms are provided that produce products from the fatty acid biosynthetic pathway (fatty acid derivatives), as well as methods of their use.
摘要:
Novel methods and compositions for DNA sequencing are provided. The methods described herein are useful for sequencing homopolymeric regions of DNA. The methods also prevent the accumulation of mistakes and inefficiencies in the sequencing reaction.
摘要:
The present invention provides recombination based methods for assembling nucleic acids. In certain aspects the present invention provides hierarchical assembly methods for producing genome sized polynucleotide constructs. The methods may be used for assembling large polynucleotide constructs, for synthesizing synthetic genomes, or for introducing a plurality of nucleotide changes throughout the genome of an organism. In another aspect, the invention provides cells having increased genomic stability. For example, cells comprising alterations in at least a substantial portion of the transposons in the genome are provided.
摘要:
Methods of improving the kinetics of bimolecular interactions where reactants are present in low concentrations are provided. Methods of pre-amplifying one or more oligonucleotides using high concentration universal primers are provided. Methods of improving the error rate in oligonucleotide and/or polynucleotide syntheses are also provided. Methods for sequence optimization and oligonucleotides design are further provided.
摘要:
Methods of reducing background during amplification of small amounts of nucleic acids employ careful analysis of sources of low level contamination. Ultraviolet light can be used to reduce nucleic acid contaminants in reagents and equipment. “Primer-dimer” background can be reduced by judicious design of primers. We have shown clean signal-to-noise with as little as starting material as one single human cell (˜6 picogram), E. coli cell (˜5 femtogram) or Prochlorococcus cell (˜3 femtogram).
摘要:
The invention generally relates to methods of performing a capture reaction. In certain embodiments, the method involves obtaining a nucleic acid, fragmenting the nucleic acid, and capturing a target sequence on the nucleic acid fragment using a capture moiety, such as a molecular inversion probe.
摘要:
The present invention generally relates to droplets and/or emulsions, such as multiple emulsions. In some cases, the droplets and/or emulsions may be used in assays, and in certain embodiments, the droplet or emulsion may be hardened to form a gel. In some aspects, a heterogeneous assay can be performed using a gel. For example, a droplet may be hardened to form a gel, where the droplet contains a cell, DNA, or other suitable species. The gel may be exposed to a reactant, and the reactant may interact with the gel and/or with the cell, DNA, etc., in some fashion. For example, the reactant may diffuse through the gel, or the hardened particle may liquefy to form a liquid state, allowing the reactant to interact with the cell. As a specific example, DNA contained within a gel particle may be subjected to PCR (polymerase chain reaction) amplification, e.g., by using PCR primers able to bind to the gel as it forms. As the DNA is amplified using PCR, some of the DNA will be bound to the gel via the PCR primer. After the PCR reaction, unbound DNA may be removed from the gel, e.g., via diffusion or washing. Thus, a gel particle having bound DNA may be formed in one embodiment of the invention.