应用广泛的细菌检测试剂盒!Identification PCR Kit

13 Jul 2007
Meng Ye
Student / Graduate

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本试剂盒是PCR扩增细菌16S rDNA的试剂盒,通过进一步对PCR扩增的DNA片段进行序列分析,可以鉴定被检测细菌种类。细菌的rRNA是细胞内含量最多的RNA,约占RNA总量的80%以上,其分子量大,种类多,由高度保守区和可变区组成。细菌的rRNA包括5S、16S、23S,其中5S rRNA信息量少,不适合分析。23S rRNA尽管分子大,信息量多,但碱基突变速度较快,同样不适用于细菌鉴定。相比之下16S rRNA的遗传较为稳定,长度在1550±200 bp左右,代表信息量适中,是研究系统进化的好材料。目前已经报道了10,000种以上的细菌16S rDNA序列。通过对16S rDNA的序列分析,可以将细菌划分到属或种。
16S rDNA可以通过PCR法扩增获得,由于16S rDNA的两端较为保守,可以在这保守区域设计引物,扩增鉴定细菌的16SrRNA基因,然后进行DNA测序,再将其DNA序列与GenBank中的已知序列进行同源性比较后,可以了解检测细菌种类。本试剂盒中包含了进行细菌16S rDNA PCR扩增的所有试剂,同时还提供了三条测序用引物(正向测序引物Seq forward、反向测序引物Seqeverse、中间测序引物Seq internal)。PCR扩增引物可以扩增细菌16S rDNA前500 bp的DNA片段(Forward primer/ Reverse primer1),以及全序列的DNA片段(Forward primer/ Reverse primer2)。16S rDNA的前500 bp序列变化较大,包含有丰富的细菌种属的特异性信息,进行DNA测序时一个测序反应即可测通,是一种较为经济便捷的16S rDNA鉴定方法;如果前500 bp序列不足以反应细菌的种属信息时,则可以进行16S rDNA的全序列PCR扩增及DNA测序,得到较为全面的16S rDNA序列信息。
对于难以培养细菌、生化反应不明显及传统表型方法不能鉴定的细菌,使用本试剂盒鉴定未知细菌种类尤为方便。

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Genome AnalysisGenomics, the study of genomes, includes functional genomics, evolutionary genomics and comparative genomics. There are many genomic technologies such as DNA sequencing of whole genomes, computational biology and bioinformatics. DNA and nucleic acids must be isolated and concentrated from cells for analysis with kits, automated analyzers and software. Other useful technologies for studying genomics include PCR, microarrays and electrophoresis.PCR and Thermal CyclingPolymerase chain reaction (PCR) kits and thermal cyclers are used for the in vitro amplification of DNA permitting subsequent analysis and experimental procedures. Explore a range of high-quality polymerase, primers and nucleotides or simplify your workflow with a PCR mastermix. Find reverse transcription PCR (RT-PCR) and cDNA synthesis kits for RNA products and libraries. Quantitatively measure the amplification of DNA with real-time PCR (qPCR) and droplet digital PCR (ddPCR) kits and systems, and discover automated PCR setup solutions to increase throughput. Alternative DNA amplification methods also include recombinase polymerase amplification (RPA) kits. Find the best PCR kits and thermal cyclers and purification equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.DNA SequencingDNA sequencing, such as sanger sequencing, is a biological technique that determines the precise order of nucleotide bases in a fragment or template of DNA. DNA sequencers and genetic analyzers are based on capillary electrophoresis, where labeled DNA fragments are electrophoretically separated by size as they migrate through a polymer. Find the best DNA sequencing products, including DNA sequencing kits, genomic libraries and genetic identity kits in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Gene Expression and Molecular CloningMolecular cloning is a set of techniques that utilizes vectors to transfer recombinant DNA into host cells and is an essential tool for investigating the expression of genes and proteins in bacterial or mammalian cells. A variety of vectors optimized for gene cloning and expression in a range of host organisms are available, alongside competent cells for genetic replication. Here, you can explore a range of molecular tools, high-quality genomic and cDNA libraries, premade clones, transformation and transfection reagents and mutagenesis or gene expression detection assays and expression arrays. Find the best gene expression and molecular cloning products in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Clinical GeneticsMolecular Genetics covers the analysis of hereditary genetic disease and chromosomal abnormalities. Genetics can be analysed using DNA, RNA, and protein microarrays, PCR, RT PCR and DNA sequencing. Genetic equipment includes genetic workstations, thermal cyclers, cooling blocks and electrophoresis products. Diagnostic kits are used for DNA / RNA extraction and purification.
应用广泛的细菌检测试剂盒!Identification PCR Kit