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    • 1. 发明申请
    • Compositions and Methods for Preventing Carry-Over Contamination in Nucleic Acid Amplification Reactions
    • 防止核酸扩增反应中携带污染的组合物和方法
    • US20080311627A1
    • 2008-12-18
    • US11663420
    • 2005-06-17
    • Reimo TetznerKurt BerlinJuergen Distler
    • Reimo TetznerKurt BerlinJuergen Distler
    • C12P19/34
    • C12Q1/6848C12Q2527/101C12Q2521/301
    • Particular aspects provide methods for the specific amplification of template DNA in the presence of potentially contaminating PCR products from previous amplification experiments, but wherein the contaminating prior reaction amplificates (carry-over contaminants) are rendered non-amplifiable, based on use of particular contaminant degradation enzymes, and use of at least one primer that is fully complementary to any contaminating prior reaction amplificate nucleic acid, but contains a mismatch with the correspond sequence of the sample template nucleic acid. Additional aspects provide a method for the specific amplification of single-stranded sample template DNA in the presence of potentially double-stranded carry-over products. Further aspects provide methods comprising use of a template-dependent thermostable DNA polymerase enzyme suitable for incorporating ribonucleotides as well as deoxy-nucleotides to provide a chimeric amplificate. After digestion with an RNase, any contaminating prior chimeric amplificate, the RNase is inactivated. These aspects are surprisingly effective alternatives to the carry over protection system known as UNG system, and other art-recognized methods.
    • 特定方面提供了在来自先前扩增实验的潜在污染性PCR产物存在下对模板DNA进行特异性扩增的方法,但其中基于使用特定污染物降解使污染的先前反应扩增(携带污染物)变得不可扩增 酶,以及使用与任何污染的先前反应扩增核酸完全互补的至少一个引物,但是含有与样品模板核酸的相应序列错配。 另外的方面提供了在存在潜在双链携带产物的情况下单链样品模板DNA的特异性扩增的方法。 另外的方面提供了包括使用适合于掺入核糖核苷酸的模板依赖性热稳定性DNA聚合酶以及脱氧核苷酸以提供嵌合扩增的方法。 用RNase消化后,任何污染的先前的嵌合扩增,核糖核酸酶被灭活。 这些方面对于被称为UNG系统的承载保护系统以及其他本领域公认的方法是惊人的有效的替代方案。