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    • 2. 发明申请
    • THERMOSTABLE POLYMERASES HAVING ALTERED FIDELITY
    • 具有更改性的热稳定聚合物
    • WO1998023733A2
    • 1998-06-04
    • PCT/US1997021940
    • 1997-11-26
    • UNIVERSITY OF WASHINGTON
    • UNIVERSITY OF WASHINGTONLOEB, Lawrence, A.HOOD, LeroySUZUKI, Motoshi
    • C12N09/12
    • C12N9/1252C12Q1/6858C12Q1/6883
    • The present invention provides a method for identifying a thermostable polymerase having altered fidelity. The method consists of generating a random population of polymerase mutants by mutating at least one amino acid residue of a thermostable polymerase and screening the population for one or more active polymerase mutants by genetic selection. For example, the invention provides a method for identifying a thermostable polymerase having altered fidelity by mutating at least one amino acid residue in an active site O-helix of a thermostable polymerase. The invention also provides thermostable polymerases and nucleic acids encoding thermostable polymerases having altered fidelity, for example, high fidelity polymerases and low fidelity polymerases. The invention additionally provides a method for identifying one or more mutations in a gene by amplifying the gene with a high fidelity polymerase. The invention further provides a method for accurately copying repetitive nucleotide sequences using a high fidelity polymerase mutant. The invention also provides a method for diagnosing a genetic disease using a high fidelity polymerase mutant. The invention further provides a method for randomly mutagenizing a gene by amplifying the gene using a low fidelity polymerase mutant.
    • 本发明提供用于鉴定具有改变的保真度的热稳定聚合酶的方法。 该方法包括通过突变热稳定聚合酶的至少一个氨基酸残基并通过遗传选择筛选一个或多个活性聚合酶突变体的群体来产生聚合酶突变体的随机群体。 例如,本发明提供了通过突变热稳定聚合酶的活性位点O-螺旋中的至少一个氨基酸残基来鉴定具有改变的保真度的耐热聚合酶的方法。 本发明还提供了具有改变的保真度的热稳定聚合酶和编码耐热聚合酶的核酸,例如高保真聚合酶和低保真度聚合酶。 本发明另外提供了通过用高保真度聚合酶扩增基因来鉴定基因中的一个或多个突变的方法。 本发明还提供了使用高保真聚合酶突变体准确地复制重复核苷酸序列的方法。 本发明还提供了使用高保真度聚合酶突变体来诊断遗传疾病的方法。 本发明还提供了通过使用低保真度聚合酶突变体扩增基因来随机诱变基因的方法。
    • 3. 发明申请
    • SIMPLIFIED HIGH FREQUENCY TUNER AND TUNING METHOD
    • 简化的高频调谐器和调谐方法
    • WO1998011672A1
    • 1998-03-19
    • PCT/US1997016372
    • 1997-09-12
    • UNIVERSITY OF WASHINGTON
    • UNIVERSITY OF WASHINGTONSUOMINEN, Edwin, A.
    • H04B01/26
    • H04B1/16H03D3/007H03D3/009H03D7/165H04B1/06H04B1/10H04B1/26H04B1/30H04L25/067
    • An RF tuner and tuning method employs analog quadrature mixing with a coarse-stepwise tunable local oscillator (24) to a near-baseband passband region, followed by A/D conversion of the I and Q signals (42, 44), correction of phase, group delay, and amplitude errors, image rejection, and translation to baseband by fixed frequency translation, stepwise channelized translation, or essentially continuously variable tuning over a given digital tuning range. The near-baseband passband region is sized and located such that alternating image rejection provides non-redundant and complete tuning coverage of a desired high frequency spectrum with a local oscillator step size equal to about twice the digital tuning range or about twice the number of channels digitally stepwise tunable times the channel width, effectively doubling the typical local oscillator step size.
    • RF调谐器和调谐方法采用模拟正交混合与粗阶段可调本地振荡器(24)到近基带通带区域,接着进行I / Q信号(42,44)的A / D转换,校正相位 ,组延迟和幅度误差,图像抑制以及通过固定频率转换,逐步通道化转换或在给定的数字调谐范围内基本上连续可变的调谐到基带的转换。 近基带通带区域的大小和位置使得交替镜像抑制提供了所需高频谱的非冗余和完全调谐覆盖,本地振荡器步长大小等于数字调谐范围的大约两倍或者是通道数量的两倍 数字逐步可调谐时间通道宽度,有效地使典型的本地振荡器步长倍增。