DNeasy mericon Food Kit

用于从食品原料或加工过的食品中纯化高品质DNA

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DNeasy mericon Food Kit (50)

Cat. No. / ID:   69514

50 QIAquick Spin Columns, Proteinase K, buffers
DNeasy mericon Food Kit适用于食品、动物饲料和医药产品检测。该产品不适用于疾病的诊断、预防、或治疗。

✓ 全天候自动处理在线订单

✓ 博学专业的产品和技术支持

✓ 快速可靠的(再)订购

特点

  • 经改善的CTAB实验流程,加快对食品样本的处理速度
  • 从加工食品中高效纯化DNA、甚至是片段化的DNA
  • 纯化复杂食品样本的DNA时不残留PCR抑制剂
  • 提供专用于深加工食品的实验方案

产品详情

DNeasy mericon Food Kit可从多种食品原料或加工食品中纯化高品质DNA。这些食品样本的PCR抑制剂残留量被最小化。该试剂盒是QIAGEN食品检测产品线的一部分,QIAGEN还提供病原体DNA检测、转基因生物DNA检测和成分鉴定试剂盒。

绩效

在食品生产制造过程中,热量、辐射、高压和pH值的变化都会导致DNA降解和片段化。DNeasy mericon Food Kit含有优化的试剂,能够回收短的DNA片段(达100 bp),确保高度片段化的DNA也能够被高效分离,并在PCR反应中得到扩增。DNeasy mericon Food Kit为适用范围广范的DNA分离方法,即使处理PCR抑制剂含量高、经过深加工的、多脂、酸性、高或低DNA含量的食品,也能获得出色、可靠的结果(参见" High yields of DNA and minimal inhibitor carryover"和" Heightened resistance to inhibitors")。此外,您无需再为不同的食品样本进行不同的裂解流程。
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原理

DNeasy mericon Food Kit采用改善的十六烷基三甲基溴化铵(CTAB)核酸提取技术。

CTAB为非离子型洗涤剂,被广泛用于从多种类型的组织中高效纯化总细胞核酸。在低盐环境中,CTAB会与核酸形成复合物;在高盐环境中,如Food Lysis Buffer中,CTAB会与多糖、蛋白或植物代谢物等细胞抑制剂形成复合物。

我们的CTAB实验方案比传统方案精简了若干流程,2.5小时内可处理多达30个样本(参见" Efficient and rapid DNA extraction")。该试剂盒能够高产量、高效的纯化DNA。

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程序

DNeasy mericon Food Kit的实验方案经过优化,结合CTAB方法和Proteinase K消化,首先消化完整的组织,然后沉淀蛋白和其他食物内细胞抑制剂。

抑制剂通过离心沉淀,纯化DNA仍留在溶液中。在随后的氯仿萃取中,没有沉淀的残留CTAB-protein、CTAB-细胞碎片、或CTAB-多糖复合物和其他亲脂性抑制剂被萃取到氯仿有机相,而被去除。稍后只会处理不含抑制剂、仅含有DNA的水相。将水相与结合缓冲液(调整结合条件)混合,并上样至QIAquick Spin Columns。获得的DNA可即用于mericon real-time PCR分析。

应用

DNeasy mericon Food Kit可从多种食品原料或加工食品中快速(2.5小时可处理30个样本)纯化DNA,且复杂食品样本中的PCR抑制剂的残留量降低至最低水平。

辅助数据和图表

资源

试剂盒操作手册 (1)
安全数据表 (1)
Download Safety Data Sheets for QIAGEN product components.
Certificates of Analysis (1)

FAQ

Why is my 260/280 ratio low after using the DNeasy mericon Food Kit?
With complex food samples, a classical evaluation of DNA purity and protein content by A260/A280 ratio is not a significant criterion. Due to inevitable traces of food matrix in the sample background, a spectroscopic evaluation of DNA or protein absorptions is highly unreliable, and we have found that there is not a correlation between 260/280 and 260/230 ratios and PCR performance. Even DNA with Low 260/280 and 260/230 can produce good PCR results.

FAQ ID - 3349
Does salt concentration in the food matter when using the DNeasy mericon Food Kit?
We have not observed any effect of NaCl concentration in the food on the effectiveness of the DNeasy mericon Food Kit.
FAQ ID - 3346
CAn I use milk or other liquids with the DNeasy mericon Food kit? What volume would I use?
Liquids can be used. Use 2 ml (for 2 g protocol) or 200 ul (for 200 mg protocol) and mix it with the Food Lysis Buffer and Proteinase K solution as in the normal protocol.
FAQ ID - 3350
Why does the DNeasy mericon Food Kit use a QIAquick column and Buffer PB rather than a DNeasy column and Buffer AL, which might be expected since the kit isolates genomic DNA?
During kit development, we determined that with the chemistry used in the kit and the tested sample material, the QIAquick column together with the buffer PB had the best performance.
FAQ ID - 3347