摘要:
Primers and probes specific to the genes encoding extended spectrum beta-lactamase that involves CTX-M groups 1 and 9 that cause extended beta-lactamase resistance in bacteria are described herein, with methods and kits for using these primers and probes to detect CTX-M groups 1 and 9 nucleic acids. In the methods described, nucleic acids present in a clinical or test sample obtained from a biological sample or tissue suspected of containing the CTX-M groups 1 and 9 gene are amplified and corresponding sequences for CTX-M groups 1 and 9 are detected. The amplified nucleic acid can be detected by a variety of state of the art methods, including fluorescence resonance energy transfer (FRET), radiolabels, enzyme labels, and the like.
摘要:
The present invention features compositions and methods for amplifying a target oligonucleotide in a sample comprising one or more primer oligonucleotides comprising a 5′ nicking enzyme recognition site and a 3′-terminal region comprising a 2′-modified nucleotide. These methods are compatible with target oligonucleotides amplified using a nicking amplification reaction.
摘要:
The present invention relates to a method for quantifying and/or detecting one or more nucleic acids of a genome in a sample, wherein in an amplification reaction, (i) a first nucleic acid is amplified, the locus that is amplified is a multicopy locus (MCL) within the genome, wherein the locus shares at least 80% sequence identity to a sequence according to SEQ ID NO. 1 over a stretch of 80 base pairs, and wherein the multicopy locus has copies on at least two different chromosomes, (ii) a second nucleic acid that has been added as an internal control (IC) is also amplified, and (iii) the amount of amplification product from the amplification of the first nucleic acid is determined.
摘要翻译:本发明涉及用于量化和/或检测样品中基因组的一种或多种核酸的方法,其中在扩增反应中,(i)第一个核酸被扩增,被扩增的基因座是多拷贝基因座 (MCL),其中所述基因座与SEQ ID NO:1的序列具有至少80%的序列同一性。 并且其中多拷贝基因座在至少两个不同染色体上具有拷贝,(ii)作为内部对照(IC)加入的第二个核酸也被扩增,并且(iii) 确定来自扩增第一核酸的扩增产物的量。
摘要:
According to the present teachings, methods and compositions are provided that utilize at least one reference dye of formula (I): In some embodiments, a method comprises measuring a detection signal of a reporter dye and at least one reference dye of formula (I). In some embodiments, a composition comprises a reference dye of formula (1), a buffer, a selection of nucleotides and a protein.
摘要:
Disclosed are a method and a kit for the quantification of nucleic acids, especially a trace amount of nucleic acid, such as host cell nucleic acid impurities, using real-time PCR with a random primer.
摘要:
Methods and systems for sequencing a biological molecule or polymer, e.g., a nucleic acid, are provided. One or more donor labels, which are attached to a pore or nanopore, may be illuminated or otherwise excited. A polymer having a monomer labeled with one or more acceptor labels, may be translocated through the pore. Either before, after or while the labeled monomer of the polymer passes through, exits or enters the pore, energy may be transferred from the excited donor label to the acceptor label of the monomer. As a result of the energy transfer, the acceptor label emits energy, and the emitted energy is detected in order to identify the labeled monomer of the translocated polymer and to thereby sequence the polymer.
摘要:
Devices and methods generate an ordered restriction map of genomic DNA extracted from whole cells. The devices have a fluidic microchannel that merges into a reaction nanochannel that merges into a detection nanochannel at an interface where the nanochannel diameter decreases in size by between 50% to 99%. Intact molecules of DNA are transported to the reaction nanochannel and then fragmented in the reaction nanochannel using restriction endonuclease enzymes. The reaction nanochannel is sized and configured so that the fragments stay in an original order until they are injected into the detection nanochannel. Signal at one or more locations along the detection nanochannel is detected to map fragments in the order they occur along a long DNA molecule.
摘要:
This invention provides nucleoside polyphosphate analogs each of which comprises a tag comprising a plurality of Raman-scattering moieties; compounds comprising said nucleoside polyphosphate analogs; and methods for determining the sequence of a single-stranded DNA or RNA using said nucleoside polyphosphate analogs. This invention also provides methods for detecting the interaction of a plurality of predetermined compounds, at least one of which having attached thereto a tag comprising a plurality of Raman-scattering moieties.