Linear kDNA

Name: Linear kDNA
SKU: L419355
Availability: InStock

货号: L419355

COA

有货

储存条件

2-8°C储存

运输条件

低温运输

规格

库存

价格

数量

1个

L419355-1EA

期货

¥1,400.90

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概述规格名称和识别符技术文档高级数据质检证书（CoA,COO,BSE/TSE 和分析图谱) 溶液计算器

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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。

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储存与运输

2-8°C储存。低温运输。请查阅批次 COA 获取详细规格。

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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。

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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

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 kDNA is tested with purified topoisomerase II.

Description

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. 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. TopoGEN has modified the original gel system described by Miller et al. (see below) to allow additional discrimination of activities using kDNA.

Shipping&storage

The marker is shipped at ambient temperature and should be stored a 4°C.