计算溶液所需的质量、体积或浓度。
为什么选择此级别
，适用于对基线干扰要求严格的色谱和分析工作流程。
储存与运输
-20°C储存。超低温运输 。请查阅批次 COA 获取详细规格。
质量文档
SDS、COA、产品数据表及规格说明书均可下载。可通过批号查询获取批次 COA。
文献证明
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。
概述
Product Info
Assays employing crude extracts for topo II activity based upon relaxation of supercoiled DNA can be complicated due to the presence of topo I in partially purified fractions. Additional complications arise with contaminating nuclease activity (due to Mg++) which degrade or nick the supercoiled substrate. These problems can be avoided by using a catenated DNA substrate prepared from the kinetoplast of the insect trypanosome Crithidia fasciculata. Kinetoplast DNA (kDNA) is an aggregate of interlocked DNA minicircles (mostly 2.5 kb) that form extremely large networks of high molecular weight. As a result, these networks fail to enter an agarose gel. Upon incubation with topo II, which engages DNA in a double stranded breaking and reunion cycle, minicircular DNAs are effectively released (decatenated). The decatenated minicircles move rapidly into the gel owing to their small size. This reaction will not occur with topoisomerase I. The products of the reaction can vary as follows:
Quality Control Tests:
For catenated KDNA substrate, at least 90% of the DNA will be retained in the well of a 1% agarose gel.
Decatenation of each batch of Kinetoplast DNA is tested with purified topoisomerase II.
Storage Buffer:
kDNA is stored in 10 mM Tris-Cl (pH 7.5), and 1 mM EDTA at the concentration specified with the product.
Description
kDNA is the ideal substrate for topoisomerase II assays because it is specific for type II reaction mechanisms. Researchers can even assay for a type II enzyme in the presence of large excess of topoisomerase I. Thus, kDNA works well to quantify type II activity in crude cell extracts, which are frequently overloaded with topoisomerase I. The kDNA substrate works exceptionally well with human Top 2a and b as well as prokaryotic enzymes, such as DNA gyrase or topoisomerase IV.
Shipping&storage
kDNA should be stored at 4°C; however, long term storage at -20°C is acceptable. The DNA is usually shipped at ambient temperature.
规格
别名
动基体 DNA (kDNA)
英文名称
Kinetoplast DNA (kDNA)
储存条件
-20°C储存
运输条件
超低温运输
名称和识别符
分子类型
小分子
技术文档
高级数据
质检证书（CoA,COO,BSE/TSE 和分析图谱)
C of A & Other Certificates(BSE/TSE, COO):
输入批号以搜索分析图谱:
通过匹配包装上的批号来查找并下载产品的 COA，每批产品都进行了严格的验证，您可放心使用！
| 批号(Lot Number) | 证书类型 | 货号 |
|---|---|---|
 J2226687 |
分析证书 | K419350 |
溶液计算器
常见问题
本产品应如何储存？
请于?20 °C条件下保存。需冷冻保存以维持规定的有效期。
本产品如何运输？
本产品采用保温箱配冰袋运输。收货后请立即拆包，并按上述储存条件保存。
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每个订单都会随附分析证书（COA），您也可以从账户订单历史中下载。如需订购前的COA，请联系您的客户代表，或使用PDP上的"申请COA"按钮——我们将提供代表性批次的COA。
产品仅提供给经过验证的企业、机构和合格的专业人员用于研发。不适用于人类、动物、诊断或治疗。
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