McrBC specifically cleaves DNA containing methyl cytosine (mC : 5-hydroxymethylcytosine, 5-methylcytosine, 4-methylcytosine) preceded by a purine nucleotide (Pu: A or G). DNA cleavage by McrBC requires at least two PumC sites within a distance of 40–2,000 bp. McrBC requires GTP for cleavage.
McrBC specifically cleaves DNA containing methyl cytosine (mC : 5-hydroxymethylcytosine, 5-methylcytosine, 4-methylcytosine) preceded by a purine nucleotide (Pu: A or G). DNA cleavage by McrBC requires at least two PumC sites within a distance of 40–2,000 bp. McrBC requires GTP for cleavage.
DNA restriction enzymes from Takara Bio are unsurpassed in quality and purity. We’ve been producing them for over 30 years and were the first manufacturers to offer commercially available restriction enzymes in Japan. Each lot of every DNA restriction enzyme undergoes stringent quality control tests. Takara Bio DNA restriction enzymes are supplied with optimized buffers that provide maximum activity during restriction enzyme digestion. Visit our restriction enzyme resource pages for information on how to digest DNA, relative activity in each Universal Buffer, star activity, buffers for double digestion, effects of DNA methylation, how to inactivate enzymes, and more.
ebiomall.com
>
>
>
>
>
>
>
>
>
>
>
>
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
ResponseofskeletalmuscleRNApolymerasesIandIItotumourgrowth
BiochimicaetBiophysicaActa(BBA)-GeneStructureandExpression,Volume950,Issue3,7September1988,Pages296-302
GeorgeA.J.Goodlad,CatherineM.Clark
或者有高手知道怎么测也行
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！
我是新手。我要开始做实验了，但一开始就碰到了个很大的问题。
我想买个能利用哺乳动物细胞RNA聚合酶将DNA转录成RNA的的质粒，向好几家公司打了电话，但都没有我想要的东西。
没有这个东西，我的实验就只能是蓝图了。哪位战友有办法的，能不能帮帮我？
不胜感激。
请规范发贴，求助贴请在标题前加【求助】，谢谢您的合作。——by草根
