
Test | Specification |
---|---|
Thrombin Activity (by coagulation) | > 500 US units/ml |
Volume | Not Specified |
Thrombin Specific Activity | > 2700 US units/mg protein |
pH (1% solution) | 6.5 - 7.5 |
Salt Environment | Glycerine 50%, Sodium Chloride, Sodium Citrate, PEG-8000 |
Microorganism Inhibitor | Sodium Azide |
This product is forin vitro(diagnostic) use only. Not for human or animal consumption.
BioPharm Laboratories" liquid thrombin is a high purity bovine thrombin stabilized in 50% glycerin. Due to thombin"s high proteolytic specificity, thombin is an important protein in recombinant fusion protein purification processes. It is used to cleave His Tags and GST Tags with a high degree of specificity. We express our units in US Units (aka, NIH Units) measured by coagulation. There are approximately 5 Thrombin cleavage units for every one US Unit.
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各位大侠:小弟最近做个长片段的CDNA与T载体的连接,片段大小6.4K,载体选用的是pUC19和pGEMT-easy,反转录酶用的是RevertAidTirstStrandcDNASynthesisKit(#K1621),CDNA第二链的扩增用的是LATaq。我是用纯病毒的RNA做模板,操作步骤严格按照说明做的,也曾经有一次获得过电泳图清晰显示的是全长6.4KB左右的片段,与载体连接,结果筛选到的几个克隆,插入的片段仅有2KB左右,奈何?可最近几次再用此反转录试剂盒却不能得到所需片段。在此,小弟想问问大家,你们是否遇到同样的问题,是如何解决的?所用的试剂(载体和酶的选择)和方法是什么,可以告诉后来者,共同进步吧。
没有序列识别的功能,他就是简单的催化相邻DNA链的5-P末端和3'-OH末端以磷酸二酯键结合的反应,需ATP作辅酶。 不仅可以催化粘性末端之间或平滑末端之间的DNA的连接,也催化DNA与RNA之间以及少数RNA之间的连接。
反转录酶(Reversetranscripatase)是以RNA为模板指导三磷酸脱氧核苷酸合成互补DNA(cDNA)的酶。哺乳类C型病毒的反转录酶和鼠类B型病毒的反转录酶都是一条多肽链。鸟类RNA病毒的反转录酶则由两上亚基结构。真核生物中也都分离出具有不同结构的反转录酶。

