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    • 3. 发明公开
    • Apparatus and method for determining the concentration of the target nucleic acid in PCR
    • 装置和方法用于确定在PCR的靶核酸的浓度
    • EP0686699A3
    • 1996-04-17
    • EP95108649.5
    • 1995-06-06
    • THE PERKIN-ELMER CORPORATION
    • Atwood, John G.
    • C12Q1/68
    • C12Q1/6816C12Q1/6851
    • Apparatus and method for determining an unknown starting molar concentration of target nucleic acid molecules at the beginning of a polymerase chain reaction in a sample reaction mixture containing suitable buffers, two complementary kinds of oligonucleotide primers, a molar excess of four kinds of nucleoside triphosphates, a DNA polymerase, and the unknown starting molar concentration of target nucleic acid molecules, wherein the two kinds of primers are provided in a known concentration (Cp o ), the method including the steps of adding a reporter molecule which does not significantly interfere with the reaction and does not emit a strong signal in the absence of double-stranded DNA, but makes the dsDNA created by the reaction detectable and measurable at least once each cycle, thermal cycling one or more standard reaction mixtures which are substantially the same in every respect except they have known starting molar concentration of target nucleic acid molecules to obtain one or more growth curves with known starting molar concentrations of target nucleic acid molecules, exciting the reaction mixture during at least the extension portion of each cycle, detecting and measuring the intensity of the signal during at least the extension portion of each of the cycles, converting said intensity to molar concentration values of dsDNA and storing the molar concentration values for each of the extension portions of each of the cycles, generating a measured curve of molar concentration of dsDNA versus cycle number from the stored concentration values, using successive approximations, determining values of e v , e s , a, C z (n) and A z (n) which provide a best fit of the measured curve to the one or more known growth curves according to the following relation: where: C n+1 and C n are the DNA template molar concentrations at the end of the n and n + 1 cycle extension periods;
      e v is in theory the template's probability of survival to the next cycle; e s is in theory the template's probability of being synthesized; C o is the molar concentration of starting target nucleic acid molecules; Cp o is the starting primer molar concentration; a is in theory the primer/complementary strand competition factor; C z is molar concentration of the polymerase enzyme; A z is specific activity of the polymerase; t z is extension time in seconds; L t is length of template in bases; Lp is length of primers in bases; and
      calculating the molar concentration of starting nucleic acid of the unknown samples by fixing e v , e s , a, C z (n), and A z (n), and adjusting the starting concentration C o to get a best fit to the measured growth curve of each unknown sample.
    • 8. 发明公开
    • Apparatus and method for determining the concentration of the target nucleic acid in PCR
    • PCR和PCR方法的最佳方法
    • EP0686699A2
    • 1995-12-13
    • EP95108649.5
    • 1995-06-06
    • THE PERKIN-ELMER CORPORATION
    • Atwood, John G.
    • C12Q1/68
    • C12Q1/6816C12Q1/6851
    • Apparatus and method for determining an unknown starting molar concentration of target nucleic acid molecules at the beginning of a polymerase chain reaction in a sample reaction mixture containing suitable buffers, two complementary kinds of oligonucleotide primers, a molar excess of four kinds of nucleoside triphosphates, a DNA polymerase, and the unknown starting molar concentration of target nucleic acid molecules, wherein the two kinds of primers are provided in a known concentration (Cp o ), the method including the steps of adding a reporter molecule which does not significantly interfere with the reaction and does not emit a strong signal in the absence of double-stranded DNA, but makes the dsDNA created by the reaction detectable and measurable at least once each cycle, thermal cycling one or more standard reaction mixtures which are substantially the same in every respect except they have known starting molar concentration of target nucleic acid molecules to obtain one or more growth curves with known starting molar concentrations of target nucleic acid molecules, exciting the reaction mixture during at least the extension portion of each cycle, detecting and measuring the intensity of the signal during at least the extension portion of each of the cycles, converting said intensity to molar concentration values of dsDNA and storing the molar concentration values for each of the extension portions of each of the cycles, generating a measured curve of molar concentration of dsDNA versus cycle number from the stored concentration values, using successive approximations, determining values of e v , e s , a, C z (n) and A z (n) which provide a best fit of the measured curve to the one or more known growth curves according to the following relation: where: C n+1 and C n are the DNA template molar concentrations at the end of the n and n + 1 cycle extension periods;

      e v is in theory the template's probability of survival to the next cycle;
      e s is in theory the template's probability of being synthesized;
      C o is the molar concentration of starting target nucleic acid molecules;
      Cp o is the starting primer molar concentration;
      a is in theory the primer/complementary strand competition factor;
      C z is molar concentration of the polymerase enzyme;
      A z is specific activity of the polymerase;
      t z is extension time in seconds;
      L t is length of template in bases;
      Lp is length of primers in bases; and

      calculating the molar concentration of starting nucleic acid of the unknown samples by fixing e v , e s , a, C z (n), and A z (n), and adjusting the starting concentration C o to get a best fit to the measured growth curve of each unknown sample.
    • 在含有合适的缓冲液,两种互补种类的寡核苷酸引物,摩尔过量的4种核苷三磷酸酯的样品反应混合物中,在聚合酶链式反应开始时确定靶核酸分子的未知起始摩尔浓度的装置和方法, DNA聚合酶和目标核酸分子的未知起始摩尔浓度,其中以已知浓度(Cpo)提供两种引物,该方法包括添加不显着干扰反应的报道分子和 在不存在双链DNA的情况下不发出强信号,但是通过反应产生的双链DNA可以每个循环至少检测一次并测量至少一次,热循环一个或多个标准反应混合物,其在各方面基本上相同,除了它们 已知已知起始摩尔浓度的目标核酸分子获得一个或多个 具有已知的起始摩尔浓度的靶核酸分子的生长曲线,在每个循环的至少延伸部分期间激发反应混合物,在每个循环的至少延伸部分期间检测和测量信号的强度,将所述强度 至dsDNA的摩尔浓度值,并存储每个循环的每个延伸部分的摩尔浓度值,使用逐次逼近,使用逐次逼近,确定ev的值,产生dsDNA相对于循环数的摩尔浓度的测量曲线与存储的浓度值 ,es,a,Cz(n)和Az(n),其根据以下关系提供测量曲线与一个或多个已知生长曲线的最佳拟合:其中:Cn + 1和Cn是DNA 在n和n + 1个循环延伸期结束时的模板摩尔浓度; ev在理论上是模板生存下一个循环的概率; 理论上是模板的合成概率; Co是起始靶核酸分子的摩尔浓度; Cpo是起始底物摩尔浓度; a在理论上是引物/互补链竞争因子; Cz是聚合酶的摩尔浓度; Az是聚合酶的比活性; tz是秒的扩展时间; Lt是基数的模板长度; Lp是碱基中引物的长度; 并通过固定ev,es,a,Cz(n)和Az(n)计算未知样品的起始核酸的摩尔浓度,并调整起始浓度Co以最佳拟合每个样品的测量生长曲线 未知样本