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    • 100. 发明申请
    • METHOD FOR PREPARING DNA FRAGMENT HAVING STICKY END
    • 用于制备具有末端的DNA片段的方法
    • US20110009607A1
    • 2011-01-13
    • US12921930
    • 2009-03-10
    • Makoto KomiyamaAkinori KuzuyaKeita Tanaka
    • Makoto KomiyamaAkinori KuzuyaKeita Tanaka
    • C12P19/34C07H21/04C07C205/06C07D239/54C07D473/28C07H19/09C07H19/19
    • C12N15/64C12N15/66C12Q1/686C12Q2565/519C12Q2525/117
    • The present invention provides a method for preparing a DNA fragment, in which a desired double-stranded DNA fragment having a sticky end is directly and easily obtained from an amplification product (an amplified fragment) after PCR without a restriction enzyme digestion. The method for preparing a DNA fragment having a sticky end of the present invention comprises: (i) a step of performing a PCR reaction using a template DNA and specific primers to obtain an amplified DNA fragment; and (ii) a step of performing a prescribed treatment on the amplified DNA fragment to dissociate a protecting group from the fragment. Herein, the above-mentioned specific primers are composed of a complementary DNA portion consisting of a nucleotide sequence complementarily binding to an amplification target region in a template DNA and a non-complementary DNA portion consisting of a nucleotide sequence that links to the 5′ end of the complementary DNA portion but does not complementarily bind to the amplification target sequence, and at least a base corresponding to the 3′ end in the nucleotide sequence of the non-complementary DNA portion is modified with a protecting group capable of terminating the progression of DNA replication catalyzed by a DNA polymerase.
    • 本发明提供了一种制备DNA片段的方法,其中在没有限制酶消化的PCR之后,从扩增产物(扩增片段)直接容易地获得具有粘性末端的所需双链DNA片段。 制备本发明粘性末端的DNA片段的方法包括:(i)使用模板DNA和特异性引物进行PCR反应以获得扩增的DNA片段的步骤; 和(ii)对扩增的DNA片段进行规定的处理以从保护基离解的步骤。 本文中,上述特异性引物由与模板DNA中的扩增对象区域互补结合的核苷酸序列和与5'末端连接的核苷酸序列组成的非互补DNA部分构成的互补DNA部分构成 的互补DNA部分,但不与扩增靶序列互补结合,并且至少对应于非互补DNA部分的核苷酸序列中3'端的碱基用能够终止进展的保护基进行修饰 由DNA聚合酶催化的DNA复制。