EnzymoPure™ 级 ，适用于对基线干扰要求严格的色谱和分析工作流程。
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在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
Es Taq DNA Polymerase是Taq与Pfu DNA Polymerase的优化混合酶，具有5′→3′DNA聚合酶活性、5′→3′ 外切酶和3′→5′ 外切酶活性。与Taq DNA Polymerase相比，Es Taq DNA Polymerase具有扩增效率高、错配率低的优良性能，能高效率扩增DNA片段。使用本品扩增得到的大部分PCR产物3′ 端附有一个“A”碱基，可直接用于T/A克隆。本产品适用于常规PCR反应和对高保真性有要求的基因克隆等反应。
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活性定义：
用活性化的大马哈鱼精子DNA作为模板/引物，在74℃，30分钟内，将10 nmol脱氧 核苷酸掺入到酸性不溶物质所需的酶量定义为1个活性单位（U）。
质量控制：
经过多次柱纯化，SDS-PAGE检测其纯度大于99%；经检测无外源核酸酶活性； PCR方法检测无宿主残余DNA；能有效地扩增人基因组中的单拷贝基因；室温存放一 个月，无明显活性改变。
使用方法：
以下举例为以人基因组DNA为模板，扩增1 kb的片段的PCR反应体系和反应条件，实 际操作中应根据模板、引物结构和目的片段大小不同进行相应的改进和优化。
1. PCR反应体系
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注意：引物浓度请以终浓度0.1-1.0 μM作为设定范围的参考。扩增效率不高的情况下，可提高 引物的浓度；发生非特异性反应时，可降低引物浓度，由此优化反应体系。
2. PCR反应条件
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注意：
1）一般实验中退火温度比扩增引物的熔解温度Tm低5℃，无法得到理想的扩增效率时，适当降 低退火温度；发生非特异性反应时，提高退火温度，由此优化反应条件。
2）延伸时间应根据所扩增片段大小设定，本产品Es Taq DNA Polymerase的扩增效率为2 kb/min。
3）可根据扩增产物的下游应用设定循环数。如果循环次数太少，扩增量不足；如果循环次数太
多，错配机率会增加，非特异性背景严重。所以在保证产物得率的前提下应尽量减少循环次数。
Es Taq DNA Polymerase is an optimized mixed enzyme of Taq and Pfu DNA Polymerase, with 5 '→ 3' DNA polymerase activity, 5 '→ 3' exonuclease activity, and 3 '→ 5' exonuclease activity. Compared with Taq DNA Polymerase, Es Taq DNA Polymerase has excellent performance of high amplification efficiency and low mismatch rate, and can efficiently amplify DNA fragments. Most of the PCR products amplified with this product contain an "A" base at the 3 'end, which can be directly used for T/A cloning. This product is suitable for conventional PCR reactions and gene cloning reactions that require high fidelity.
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Activity definition:
Using activated salmon sperm DNA as a template/primer, the amount of enzyme required to incorporate 10 nmol of deoxyribonucleotide into acidic insoluble substances is defined as 1 active unit (U) at 74 ℃ for 30 minutes.
Quality control:
After multiple column purifications, SDS-PAGE detected a purity of over 99%; No exogenous nuclease activity detected; PCR method for detecting residual DNA without host; Can effectively amplify single copy genes in the human genome; Store at room temperature for one month without significant changes in activity.
1. PCR reaction system
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Attention: The primer concentration should be between 0.1 and 1.0 as the final concentration μ M serves as a reference for setting the range. In the case of low amplification efficiency, the concentration of primers can be increased; When non-specific reactions occur, the primer concentration can be reduced to optimize the reaction system.
2. PCR reaction conditions
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Attention:
1) In general experiments, if the annealing temperature is 5 ℃ lower than the melting temperature Tm of the amplification primer, and the ideal amplification efficiency cannot be achieved, the annealing temperature should be appropriately reduced; When non-specific reactions occur, increase the annealing temperature to optimize the reaction conditions.
2) The extension time should be set according to the size of the amplified fragment. The amplification efficiency of Es Taq DNA Polymerase in this product is 2 kb/min.
3) The number of cycles can be set based on the downstream application of the amplification product. If the number of cycles is too small, the amplification amount is insufficient; If there are too many cycles, the probability of mismatches will increase, and non-specific backgrounds will be severe. So, while ensuring product yield, the number of cycles should be minimized as much as possible.
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