Abstract:
In exemplary implementations of this invention, a photoelectrode includes a semiconductor for photocarrier generation, and a catalyst layer for altering the reaction rate in an adjacent electrolyte. The catalyst layer covers part of the semiconductor. The thickness of the catalyst layer is less than 60% of its minority carrier diffusion distance. If the photoelectrode is a photoanode, it has an OEP that is more than the potential of the valance band edge but less than the potential of the Fermi level of the semiconductor. If it is a photocathode, it has an RHE potential that is less than the potential of the conduction band edge but more than the potential of the Fermi level of the semiconductor. The absolute value of difference (OEP minus potential of valence band edge, or RHE potential minus potential of conduction band edge) is greater than zero and less than or equal to 0.2V.
Abstract:
Methods and devices are provided for preparing a protein array having a plurality of proteins. In one embodiment, the method includes providing a plurality of nucleic acids each having a predefined sequence and expressing in vitro a plurality of proteins from the plurality of nucleic acids. In another embodiment, protein arrays having a solid surface and a microvolume are also provided. The solid surface can have a plurality of anchor oligonucleotides capable of hybridizing with a plurality of nucleic acids. The microvolume can cover each of the plurality of anchor oligonucleotides and can be configured to produce a polypeptide from each of the plurality of nucleic acids.
Abstract:
Methods of obtaining sequence information about target polynucleotide having a predefined sequence are disclosed. The methods include sequencing by ligation and sequencing by polymerase.
Abstract:
Methods and apparatus relate to reduction of sequence errors generated during synthesis of nucleic acids on a microarray chip. The error reduction can include synthesis of complementary stands (to template strands), using a short universal primer complementary to the template strands and polymerase. Heteroduplex can be formed be melting and re-annealing complementary stands and template strands. The heteroduplexes containing a mismatch can be recognized and cleaved by a mismatch endonuclease. The mismatch-containing cleaved heteroduplexes can be removed from the microarray chip using a global buffer exchange. The error free synthetic nucleic acids generated therefrom can be used for a variety of applications, including synthesis of biofuels and value-added pharmaceutical products.
Abstract:
Certain aspects of the present invention provide methods for designing and engineering metabolic pathways. Aspects of the invention also provide metabolic pathway components and cells containing engineered metabolic pathways. Certain aspects of the invention provide medical, pharmaceutical, industrial, agricultural, environmental, and other Nuses for engineered metabolic pathways of the invention.
Abstract:
In a method for creating polymer arrays through photoelectrochemically modulated acid/base/radical generation for combinatorial synthesis, electrochemical synthesis is guided by a spatially modulated light source striking a semiconductor in an electrolyte solution. A substrate having at its surface at least one photoelectrode that is proximate to at least one molecule bearing at least one chemical functional group is provided, along with a reagent-generating chemistry co-localized with the chemical functional group and capable of generating reagents when subjected to a potential above a threshold. An input potential is then applied to the photoelectrode that exceeds the threshold in the presence of light and that does not exceed the threshold in the absence of light, causing the transfer of electrons to or from the substrate, and creating a patterned substrate. The process is repeated until a polymer array of desired size is created.
Abstract:
Certain aspects of the present invention provide methods for assembling nucleic acid libraries that represent large numbers of sequence variants. Some embodiments involve generating libraries of RNA molecules that can be subjected to in vivo screens or selections to identify one or more aptamers. Certain aspects of the invention provide cells that transcribe one or more different aptamers (e.g., 10) that each bind to a different ligand and are each fused to a different reporter RNA.
Abstract:
Disclosed are methods of manufacturing synthetic DNAs, that is, DNAs made at least in significant part by chemical synthesis of nucleic acid polymers. Also provided are methods for assembling plural DNAs in the same pool by multiplexed assembly of synthetic oligonucleotides. In exemplary embodiments, the methods involve preamplification of one or more oligonucleotides using "universal" primers, reduction of the error rate in oligonucleotide and/or nucleic acid products, and sequence optimization and oligonucleotides design. Also provided are low-purity arrays of nucleic acids and methods for assembling nucleic acids using oligonucleotides obtained from low-purity arrays.
Abstract:
This invention generally relates to nucleic acid synthesis, in particular DNA synthesis. More particularly, the invention relates to the production of long nucleic acid molecules with precise user control over sequence content. This invention also relates to the prevention and/or removal of erros within nucleic acid molecules.
Abstract:
An electronic book comprising multiple, electronically addressable, page displays is described. Said page displays may be formed on flexible, thin substrates. Said book may additionnally encompass memory, power, control functions and communications.