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    • 7. 发明授权
    • Analysis of nicked DNA by matched ion polynucleotide chromatography under denaturing conditions
    • 在变性条件下通过匹配离子多核苷酸色谱分析切口DNA
    • US06461819B1
    • 2002-10-08
    • US09643120
    • 2000-08-21
    • Douglas T. GjerdePaul D. Taylor
    • Douglas T. GjerdePaul D. Taylor
    • C12Q168
    • C12Q1/6816C12Q2565/137C12Q2565/131
    • The present invention provides a method for calibrating a MIPC column wherein the calibration relates to the determination of the organic solvent component in the mobile phase required to elute dsDNA fragments of different base pair lengths at specific retention times. Since a MIPC column affords highly reproducible separations, once calibrated, the base pair length of unknown dsDNA fragments can be determined by comparing their retention times to those obtained on a standard calibration chromatogram. The standard calibration chromatogram is obtained by chromatographing a standard dsDNA ladder containing fragments of known base pair length. In addition, a method is provided to determine the presence of nicks in dsDNA using MIPC under fully denaturing conditions, e.g., 80° C. In one embodiment, this method is applied to the detection of mutations in dsDNA.
    • 本发明提供了一种用于校准MIPC柱的方法,其中校准涉及在特定保留时间洗脱不同碱基对长度的dsDNA片段所需的流动相中有机溶剂组分的测定。 由于MIPC柱提供高度可重复的分离,一旦校准,可以通过将其保留时间与在标准校准色谱图上获得的保留时间进行比较来确定未知dsDNA片段的碱基对长度。 标准校准色谱图是通过色谱分离含有已知碱基对长度的片段的标准dsDNA梯度而获得的。 此外,提供了一种方法,用于在完全变性条件(例如80℃)下使用MIPC测定dsDNA中缺口的存在。在一个实施方案中,该方法用于检测dsDNA中的突变。
    • 9. 发明授权
    • Matched ion polynucleotide chromatography (MIPC) process for separation
of polynucleotide fragments
    • 用于分离多核苷酸片段的匹配离子多核苷酸色谱(MIPC)方法
    • US5986085A
    • 1999-11-16
    • US65913
    • 1998-04-24
    • Douglas T. GjerdeRobert M. HaefelePaul D. Taylor
    • Douglas T. GjerdeRobert M. HaefelePaul D. Taylor
    • C12N15/10C07H21/00C07H21/02C07H21/04
    • C12N15/101
    • A batch process for obtaining polynucleotide fragments, such as dsDNA, having a selected size from a mixture of polynucleotide fragments including the steps of a) applying a solution of the mixture of polynucleotide fragments and a counterion agent to a binding medium having a hydrophobic surface; b) contacting the binding medium with a first stripping solvent and counterion agent, the first stripping solvent having a concentration of organic component sufficient to release from the binding medium all polynucleotide fragments having a size smaller than the selected size, and removing the first stripping solvent from the binding medium; and c) contacting the binding medium with a second stripping solvent having a concentration of organic component sufficient to release from the binding medium the polynucleotide fragments having the selected size, and removing the second stripping solvent from the binding medium. The binding medium can be organic polymer or inorganic particle beads. The mixture of polynucleotides can be the product of a PCR amplification. The binding medium can be contained within a column, a web or a container.
    • 用于从多核苷酸片段的混合物中获得具有选定大小的多核苷酸片段(例如dsDNA)的分批方法,包括以下步骤:a)将多核苷酸片段和抗衡离子混合物的溶液施用于具有疏水性表面的结合介质; b)使所述结合介质与第一剥离溶剂和抗衡离子剂接触,所述第一剥离溶剂具有足以从所述结合介质释放的有机组分的浓度,所述多个片段的尺寸小于所选择的尺寸,并且除去所述第一剥离溶剂 从结合介质; 和c)使所述结合介质与第二剥离溶剂接触,所述第二剥离溶剂具有足以从所述结合介质释放具有所选择尺寸的多核苷酸片段的有机组分浓度,以及从所述结合介质中除去所述第二剥离溶剂。 结合介质可以是有机聚合物或无机颗粒珠。 多核苷酸的混合物可以是PCR扩增的产物。 结合介质可以包含在柱,网或容器中。