363results about How to "High copy number" patented technology

Methods and compositions for digital profiling of nucleic acid sequences present in a sample are provided.

The invention provides methods for simultaneously amplifying multiple nucleic acid regions of interest in one reaction volume as well as methods for selecting a library of primers for use in such amplification methods. The invention also provides library of primers with desirable characteristics, such as minimal formation of amplified primer dimers or other non-target amplicons.

A significantly increased amount of a monoclonal antibody is obtained from the culture medium of recombinant hybridoma prepared by introducing genes encoding a protein identical to the immunoglobulin heavy chain polypeptide of the specific monoclonal antibody into an immortalized B cell (hybridoma) producing the monoclonal antibody.

The invention provides methods, systems, and computer readable medium for detecting ploidy of chromosome segments or entire chromosomes, for detecting single nucleotide variants and for detecting both ploidy of chromosome segments and single nucleotide variants. In some aspects, the invention provides methods, systems, and computer readable medium for detecting cancer or a chromosomal abnormality in a gestating fetus.

The invention discloses a CAR-T transgene vector based on replication defective recombinant lentivirus. The CAR-T transgene vector comprises an original nuclear replicon pUCOri sequence, a resistance gene AmpR sequence containing ampicillin, a virus replicon SV40 Ori sequence, a lentivirus packaging cis element, ZsGreen1 green fluorescent protein, an IRES ribosome binding sequence, a human EF1 alpha promoter , a chimeric antigen receptor of second-generation CAR or third-generation CAR and a regulating element, wherein the original nuclear replicon pUCOri sequence is used for plasmid replication; the resistance gene AmpR sequence is used for massively proliferating target strains; the virus replicon SV40 Ori sequence is used for enhancing replication in eukaryocyte; the lentivirus packaging cis element is used for lentivirus packaging; the ZsGreen1 green fluorescent protein is used for expressing green fluorescent for eukaryocyte; the IRES ribosome binding sequence is used for jointly transcribing and expressing protein; the human EF1 alpha promoter is used for conducting eukaryotic transcription on antigen receptor genes; the chimeric antigen receptor is used for forming the second-generation CAR or the third-generation CAR integrating recognition, transfer and start; the regulating element is used for enhancing expression efficiency of transgenes and used after eWPRE-enhanced type woodchuck hepatitis b virus is transcribed. Besides, the invention further discloses a construction method and application of the vector. By means of the CAR-T transgene vector and the construction method and application of the vector, secretion of cell factors and an in vitro killing effect of CAR-T cells can be remarkably improved, and the clinical treatment effect is remarkable.

A microorganism strain suitable for fermentative production of L-methionine and preparable from a starting strain, which comprises increased activity of a yjeH gene product or of a gene product of a yjeH homolog, compared to the starting strain.

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.

The invention provides an overexpression porcine co-stimulatory 4-1BB vector and application thereof. PCR (polymerase chain reaction) amplification is performed on a left homologous arm and a right homologous arm of an intron 1 of a rosa26 gene, a 4-1BB regulatory sequence and an OCT4 specific promoter; the left homologous arm, a 4-1BB expression cassette, LoxP locus-contained Cre and Neo expression cassettes, the right homologous arm and negative selection DTA diphtheria toxin are connected in sequence to obtain a 4-1BB homologous recombinant vector p4BOCNDR; the vector and a CRISPR/Cas9 (clustered regularly interspaced short palindromic repeats/CRISPR-associated) targeting vector of sgRNA (small guide ribonucleic acid) containing the intron 1 of the specific targeting porcine rosa26 gene are transferred together into a porcine fetus fibroblast; by taking a positive cell as a donor cell and an oocyte as a recipient cell, a cloned embryo is obtained through a somatic cell nuclear transfer technique; the cloned embryo is transplanted into a porcine uterus for fetation to obtain a transgenic pig integrating a 4-1BB gene at the fixed point of a first intron of the rosa26 gene and automatically deleting a marker gene.

The invention provides methods for simultaneously amplifying multiple nucleic acid regions of interest in one reaction volume as well as methods for selecting a library of primers for use in such amplification methods. The invention also provides library of primers with desirable characteristics, such as minimal formation of amplified primer dimers or other non-target amplicons.

The invention provides methods for simultaneously amplifying multiple nucleic acid regions of interest in one reaction volume as well as methods for selecting a library of primers for use in such amplification methods. The invention also provides library of primers with desirable characteristics, such as minimal formation of amplified primer dimers or other non-target amplicons.

Described herein are approaches to the detection and quantitation of short RNAs in a biological sample. The methods permit the detection and quantitation of individual species of short RNA in a nucleic acid sample, both singly and in a multiplex format that permits the determination of expression levels for two or more target short RNAs in a single reaction.

The invention provides a plant high-efficiency homologous recombination method based on CRISPR/Cas9. According to the plant high-efficiency homologous recombination method based on CRISPR/Cas9, a geneediting carrier and a gene homologous recombination carrier are constructed based on plant target genes for editing, the two carriers are adopted for conversion of plants at the same time so as to obtain transgenic plants; wherein the gene editing carrier at least comprises a Cas9 expression cassette and a gRNA expression cassette; the gene homologous recombination carrier at least comprises a copying sub-element, a homologous left arm, a gene for knocking in, and a homologous right arm which come from bean yellow dwarf virus. According to the plant high-efficiency homologous recombination method, a target donor fragment and a gene editing element are constructed onto the two carriers respectively, so that the load of replicors is reduced, the copy number of the target homologous segmentis increased, the copy number of a target sequence is increased on the base of effective editing on chromosome, and homologous recombination efficiency is increased greatly.

This disclosure relates to a chimeric antigen receptor for binding with a target antigen. The chimeric antigen receptor comprises at least one antigen specific targeting region including a multispecific antibody evolved from a wild-type antibody or a fragment thereof and having at least one of: (a) a decrease in activity in the assay at the normal physiological condition compared to the wild-type antibody or the fragment thereof, and (b) an increase in activity in the assay under the aberrant condition compared to the wild-type antibody or the fragment thereof. A method for using the chimeric antigen receptor and cytotoxic cells for cancer treatment is also provided. A method for producing the chimeric antigen receptor is also provided.

The present invention provides compositions for making and methods of using a hand-held nucleic acid amplification device, comprising a disposable biochip with a series of sample wells, each sample well having a novel optical arrangement that includes a light-emitting diode (LED) and a single light capturing element (e.g. a photodiode) for quickly measuring light emissions from biological samples such as nucleic acid amplification reactions. Such a device can utilize isothermal amplification for obtaining detectable yields of amplified nucleic acid product in short time periods, for example, within seconds.

The present invention concerns a new method for the biological preparation of a diol comprising culturing a microorganism genetically modified for the bioproduction of an aliphatic diol, wherein the microorganism comprises a metabolic pathway for the decarboxylation of a hydroxy-2-keto-aliphatic acid metabolite with an enzyme having a 2-keto acid decarboxylase activity, the product obtained from said decarboxylation step being further reduced into the corresponding aliphatic diol, and wherein the microorganism is genetically modified for the improved production of said hydroxy-2-keto-aliphatic acid metabolite.

The invention also concerns a modified microorganism for the production of an aliphatic diol.