5' TO 3' EXONUCLEASE MUTATIONS OF THERMOSTABLE DNA POLYMERASES
    3.
    发明授权
    5' TO 3' EXONUCLEASE MUTATIONS OF THERMOSTABLE DNA POLYMERASES 失效
    在热稳定DNA聚合酶的5'-3“外切酶活性的突变

    公开(公告)号:EP0550687B1

    公开(公告)日:1999-06-09

    申请号:EP91919358.1

    申请日:1991-09-30

    IPC分类号: C12N15/54 C12N9/12 C12N1/21

    CPC分类号: C12N9/1252

    摘要: The present invention relates to thermostable DNA polymerases which exhibit a different level of 5' to 3' exonuclease activity than their respective native polymerases. Particular conserved amino acid domains in thermostable DNA polymerases are mutated or deleted to alter the 5' to 3' exonuclease activity of the polymerases. The present invention also relates to means for isolating and producing such altered polymerases.

    PURIFIED THERMOSTABLE ENZYME
    6.
    发明授权
    PURIFIED THERMOSTABLE ENZYME 失效
    纯化的热稳定性酶

    公开(公告)号:EP0395736B1

    公开(公告)日:1996-03-20

    申请号:EP89902422.8

    申请日:1989-01-12

    IPC分类号: C12N15/54 C12N9/12

    摘要: Recombinant DNA sequences encoding a thermostable DNA polymerase from Thermus aquaticus can be used to produce a recombinant protein with a molecular weight of about 86,000-95,000 daltons. The thermostable recombinant enzyme can be used in a temperature-cycling chain reaction wherein at least one nucleic acid sequence is amplified in quantity from an existing sequence with the aid of selected primers and nucleotide triphosphates. The enzyme is preferably stored in a buffer containing non-ionic detergents that lends stability to the enzyme.