Accuris Taq DNA Polymerase and Master Mix
Accuris Taq DNA Polymerase provides superior results for routine applications. Modified to improve DNA-binding, this polymerase offers higher processivity and greater template affinity, resulting in consistently superior performance. Accuris Taq Polymerase exhibits a 5 to 3 nuclease activity, but no 3 to 5 (proofreading) activity and works well with a wide range of DNA templates including GC-rich sequences.
· Ideal for routine PCR applications as well as genotyping, colony PCR and fast PCR.
· Improved template affinity and increased processivity for higher enzymatic activity and greater yields.
· Proprietary buffer optimized for a variety of assay conditions.
· Supplied with 5X buffer or as a convenient 2X Master Mix.
The polymerase is supplied with a 5X buffer containing MgCl2 and a proprietary mix of enhancers (dNTPs not included). For convenience, Accuris Taq is also available in a ready to use 2X Master Mix - just add primers and template DNA. The Master Mix can be ordered with a red loading dye that allows samples to be loaded directly on an agarose gel.
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1970科家致癌RNA病毒发现种特殊RNA病毒聚合酶,该酶能RNA模板,根据碱基互补原则.程与般病毒转录向相反,故称逆转录,催化程酶称逆转录酶,发现哺乳物胚胎细胞裂淋巴细胞含.
逆转录病毒称携带逆转录酶病毒,先侵入宿主细胞病毒RNA模板,靠酶形DNA环化,合宿主细胞染色体原病毒形式宿主细胞代代传.
HIV(艾滋病病毒)典型逆转录病毒
⒈通过嵌入DNA双链的碱基之间,形成稳定复合物,抑制DNA复制与RNA合成,从而阻碍快速生长的癌细胞的分裂。
⒉抑制拓扑异构酶II,影响DNA超螺旋转化成为松弛状态,从而阻碍DNA复制与转录。有研究显示拓扑异构酶II抑制剂(除蒽环类药物还包括依托泊苷等)能够阻止拓扑异构酶II的翻转,而这点对于它从它的核酸底物上脱离是必需的。这就意味着,拓扑异构酶II抑制剂使拓扑异构酶II的复合物在DNA链断裂之后才能更稳定,导致后者催化了DNA的破坏;同时,拓扑异构酶II抑制剂还能阻碍连接酶对DNA的修复。
⒊螯合铁离子后产生自由基从而破坏DNA、蛋白质及细胞膜结构。向左转|向右转
最近遇到了实验上的大问题,就是用一步法做RNA的荧光定量PCR时,发现低浓度的做不出来,而DNA是可以的,想请问各位在一步法PCR中有没有什么高见,就是逆转录的Buffer有没有什么需要注意的地方!就是在逆转录酶的最适Buffer和Taq酶的最适Buffer中寻找一个最适的Buffer!