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    • 12. 发明授权
    • Detection of mutations in nucleic acids by chemical cleavage
    • 通过化学裂解检测核酸中的突变
    • US5972618A
    • 1999-10-26
    • US130258
    • 1998-08-06
    • Will Bloch
    • Will Bloch
    • G01N33/50C12N15/09C12Q1/68C07H21/02C07H21/04C12P19/34
    • C12Q1/6827
    • Improved methods, compositions and kits for detecting mutations in nucleic acids are disclosed, such comprise annealing a piece of control nucleic acid without mutations to a piece of test nucleic acid very similar in sequence to the control nucleic acid but possibly containing mutations, treating this mixture with potassium permanganate or hydroxylamine to remove mismatched bases from the duplex nucleic acid, treating the resulting nucleic acid with any of a class of diamines, triamines, and tetraamines analogous to 1,2-ethylenediamine to cleave abasic sites, and then analyzing the chemically treated nucleic acid to determine whether cleavage has occurred and approximately at what position in the nucleic acid any cleavage has occurred. Inclusion of betaine in the base-removal reactions improves their sensitivity and specificity. This series of non-hazardous, non-noxious, chemical treatments can be performed rapidly in a single reaction tube with no or minimal intervening separation steps; and the cleavage product can be prepared for the analysis step without removing the chemical reagents used to effect cleavage.
    • 公开了改进的用于检测核酸突变的方法,组合物和试剂盒,这包括对一片对照核酸进行退火,而不突变到与对照核酸非常相似的测试核酸片段,但可能含有突变,处理该混合物 用高锰酸钾或羟胺从双链核酸中除去错配的碱基,用类似于1,2-乙二胺的一类二胺,三胺和四胺处理所得核酸,以切割脱碱基位点,然后分析化学处理 核酸,以确定是否已经发生切割,并且大约在核酸中发生任何切割的位置。 在脱碱反应中包含甜菜碱可以提高其敏感性和特异性。 这种无毒无毒化学处理可以在单个反应管中快速进行,没有或最小的介入分离步骤; 并且可以制备裂解产物用于分析步骤而不除去用于切割的化学试剂。
    • 16. 发明申请
    • Methods for the Reduction of Stutter in Microsatellite Amplification
    • 减少微卫星放大技术的方法
    • US20080213859A1
    • 2008-09-04
    • US11742524
    • 2007-04-30
    • Sulekha Rao CoticoneWill Bloch
    • Sulekha Rao CoticoneWill Bloch
    • C12N9/10
    • C12Q1/686C12Q1/6846C12Q1/6848C12Q1/6876C12Q2527/125C12Q2525/151
    • The invention provides a method for reducing stutter in the amplification of a microsatellite comprising the steps of providing a sample comprising a microsatellite having a G+C content of 50% or less; contacting the sample with at least one enzyme having nucleic acid polymerase activity; and incubating the sample with the enzyme for a sufficient amount of time and under conditions sufficient to amplify the microsatellite; wherein the incubation is performed in the presence of an amount of betaine, sorbitol or mixtures thereof, effective to reduce stutter relative to the amount of stutter observed in the absence of betaine and/or sorbitol. The invention also provides compositions containing betaine and/or sorbitol, kits for amplifying microsatellites having a G+C content of 50% or less, and methods of using all of the foregoing.
    • 本发明提供了减少微卫星扩增中的口吃的方法,包括以下步骤:提供包含G + C含量为50%或更少的微卫星的样品; 使样品与至少一种具有核酸聚合酶活性的酶接触; 并将样品与酶温育足够的时间和足以扩增微卫星的条件; 其中在一定量的甜菜碱,山梨糖醇或其混合物的存在下进行培养,其有效地相对于在不存在甜菜碱和/或山梨醇的情况下观察到的口吃量减少口吃。 本发明还提供含有甜菜碱和/或山梨糖醇的组合物,用于扩增G + C含量为50%以下的微卫星的试剂盒,以及使用上述所有方法。
    • 18. 发明授权
    • Method of reducing non-specific amplification in PCR
    • 降低PCR中非特异性扩增的方法
    • US06783940B2
    • 2004-08-31
    • US09998887
    • 2001-10-31
    • Ian J. McLaughlinSulekha Rao CoticoneWill Bloch
    • Ian J. McLaughlinSulekha Rao CoticoneWill Bloch
    • C12Q168
    • C12Q1/686C12Q2527/125
    • The invention provides methods for reducing non-specific amplification DNA in a polymerase chain reaction comprising providing a sample comprising a target DNA sequence of interest; contacting the sample with at least one enzyme having nucleic acid polymerase activity; and incubating the sample with said enzyme for a time and under conditions sufficient to amplify the target DNA sequence, forming amplified target sequence; wherein the incubation is performed in the presence of an amount of sorbitol, or sorbitol and DMSO effective to reduce the non-specific amplification relative to the amount of non-specific amplification observed in the absence of sorbitol, or sorbitol and DMSO. The methods are suitable for amplification of ribosomal DNA, particularly from clinical samples. Compositions and kits containing sorbitol, or sorbitol and DMSO for reducing non-specific amplification are also provided.
    • 本发明提供了降低聚合酶链反应中的非特异性扩增DNA的方法,包括提供包含目标DNA序列的样品; 使样品与至少一种具有核酸聚合酶活性的酶接触; 并将样品与所述酶一起孵育一段时间并在足以扩增靶DNA序列的条件下形成扩增的靶序列; 其中在一定量的山梨糖醇或山梨糖醇和DMSO的存在下进行培养,所述山梨糖醇或山梨糖醇和DMSO相对于在不存在山梨醇或山梨糖醇和DMSO的情况下观察到的非特异性扩增量有效减少非特异性扩增。 该方法适用于扩增核糖体DNA,特别是临床样品。 还提供了含有山梨醇或山梨糖醇和DMSO用于降低非特异性扩增的组合物和试剂盒。