摘要:
A process for amplifying any target nucleic acid sequence contained in a nucleic acid or mixture thereof comprises treating separate complementary strands of the nucleic acid with a molar excess of two oligonucleotide primers and extending the primers with a thermostable enzyme to form complementary primer extension products which act as templates for synthesizing the desired nucleic acid sequence. The amplified sequence can be readily detected. The steps of the reaction can be repeated as often as desired and involve temperature cycling to effect hybridization, promotion of activity of the enzyme, and denaturation of the hybrids formed.
摘要:
The present invention is directed to a process for amplifying any target nucleic acid sequence contained in a nucleic acid or mixture thereof using a thermostable enzyme. The process comprises treating separate complementary strands of the nucleic acid with a molar excess of two oligonucleotide primers, extending the primers with a thermostable enzyme to form complementary primer extension products which act as templates for synthesizing the desired nucleic acid sequence, and detecting the sequence so amplified. The steps of the reaction can be repeated as often as desired and involve temperature cycling to effect hybridization, promotion of activity of the enzyme, and denaturation of the hybrids formed.
摘要:
The present invention is directed to a process for amplifying any target nucleic acid sequence contained in a nucleic acid or mixture thereof using a thermostable enzyme. The process comprises treating separate complementary strands of the nucleic acid with a molar excess of two oligonucleotide primers, extending the primers with a thermostable enzyme to form complementary primer extension products which act as templates for synthesizing the desired nucleic acid sequence, and detecting the sequence so amplified. The steps of the reaction can be repeated as often as desired and involve temperature cycling to effect hybridization, promotion of activity of the enzyme, and denaturation of the hybrids formed.
摘要:
A process of detecting a target nucleic acid using labeled oligonucleotides uses the 5' to 3' nuclease activity of a nucleic acid polymerase to cleave annealed labeled oligonucleotide from hybridized duplexes and release labeled oligonucleotide fragments for detection. This process is easily incorporated into a PCR amplification assay.
摘要:
Disclosed are mutant DNA polymerases having improved extension rates relative to a corresponding, unmodified polymerase. The mutant polymerases are useful in a variety of disclosed primer extension methods. The mutant polymerases overcome the inhibitory effects by an intercalating dye. Therefore, the mutant polymerases are useful in a variety of disclosed methods in combination with an intercalating dye. Also disclosed are related compositions, including recombinant nucleic acids, vectors, and host cells, which are useful, e.g., for production of the mutant DNA polymerases.
摘要:
Disclosed are mutant DNA polymerases having improved extension rates relative to a corresponding, unmodified polymerase. The mutant polymerases are useful in a variety of disclosed primer extension methods. The mutant polymerases overcome the inhibitory effects by an intercalating dye. Therefore, the mutant polymerases are useful in a variety of disclosed methods in combination with an intercalating dye. Also disclosed are related compositions, including recombinant nucleic acids, vectors, and host cells, which are useful, e.g., for production of the mutant DNA polymerases.
摘要:
Recombinant DNA sequences encoding the DNA polymerase activity of Thermus thermophilus can be used to construct recombinant vectors and transformed host cells for production of the activity. T. thermophilus DNA polymerase is an .about.94 kDa protein especially useful in the DNA amplification procedure known as the polymerase chain reaction.
摘要:
A purified thermostable enzyme is derived from the eubacterium Thermotoga maritima. The enzyme has a molecular weight as determined by gel electrophoresis of about 97 kilodaltons and DNA polymerase I activity. The enzyme can be produced from native or recombinant host cells and can be used with primers and nucleoside triphosphates in a temperature-cycling chain reaction where at least one nucleic acid sequence is amplified in quantity from an existing sequence.
摘要:
Expression vectors containing coding sequences under the control of SV40 early and RSV promoters are disclosed as useful in producing proteins in saccharomyces yeasts. Construction of such vectors, and their use in yeast transformations are described.
摘要:
A purified thermostable enzyme is derived from the eubacterium Thermotoga maritima. The enzyme has a molecular weight as determined by gel electrophoresis of about 97 kilodaltons and DNA polymerase I activity. The enzyme can be produced from native or recombinant host cells and can be used with primers and nucleoside triphosphates in a temperature-cycling chain reaction where at least one nucleic acid sequence is amplified in quantity from an existing sequence.