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低温
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99
- 供应商:
上海圻明生物
- 规格:
50次
Theileria mutans突变泰勒虫染料法荧光定量PCR试剂盒上海圻明生物优势供应。更多产品资料欢迎免费咨询。
One of the many important uses of PCR technology is that it can be used to label DNA probes with high specific activity. PCR technology has high specificity, and can synthesize probe DNA fragments in quantities within 1~2h if [α-32P]dNTP or other markers are added to the substrate
dNTPs, the probe DNA can be well labeled during DNA synthesis, and the incorporation rate of the marker can be as high as 70%~80%. Therefore, PCR labeling technology is particularly suitable for large-scale detection and non-radiolabeling. The disadvantage of this method is that a specific pair of PCR primers is synthesized.
Labeling can also be achieved by using small fragments prepared from probe DNA as primers.
Solution preparation
1. Prepare a stock solution
Unless otherwise stated, all unused stock solutions should be divided into disposable aliquots and stored at -20 °C after preparation. Avoid repeated freeze-thaw cycles.
1.1* Acid Stock Solution (125X):
Add 20 μL DMSO to *ate (component B) to make a 125X* acid stock solution.
2. Prepare standard solutions
*Salt standard solution
Add 50 μL of 1 mM KH2PO4 (Component C) to 950 μL of deionized water or enzyme reaction buffer to give a 50 μM * saline standard solution (PS7). A 50 μM * saline standard solution (PS7) was taken and serially diluted 1:2 to obtain a serially diluted phosphate standard with deionized water or enzyme reaction buffer.
3. Prepare a working solution
Add 20 μL of 125X* stock solution to 2.5 mL of sterile H2O and mix well to make a working solution of *salt. Avoid potential Pi contamination. Note: Avoid direct exposure of *salts (component B) to light. Due to the high sensitivity of this assay to Pi, it is extremely important to use Pi-free labware and reagents.
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文献和实验可分为荧光探针和荧光染料。荧光探针又包括Beacon技术(分子信标技术,以美国人Tagyi为代表)、 TaqMan探针(以美国ABI公司为代表)和FRET技术(以罗氏公司为代表)等;荧光染料包括饱和荧光染料和非饱和荧光染料,非饱和荧光染料的典型代表就是现在最常用的SYBR GreenⅠ;饱和荧光染料有EvaGreen、LC Green等。 嵌合荧光染料法(SYBR GreenⅠ)SYBR Green I是荧光定量PCR最常用的DNA结合染料,与双链DNA非特异性结合。在游离
标记(生物素、荧光、地高辛和Eu3+等)、引入与蛋白质结合的DNA序列、引入突变位点、插入与缺失突变序列和引入启动子序列等。 2 特定PCR的引物设计 在尽量遵循引物设计基本原则的同时,根据不同的实验目的,需要注意一些相应的事项,总结如下: 01 荧光定量PCR 荧光定量PCR有染料法和探针法两种。染料法只需要设计引物,而探针法除设计引物之外还得设计一条探针。 引物设计要尽量满足以下要求: 确保模板是cDNA
GreenⅠ;饱和荧光染料有EvaGreen、LC Green等。 嵌合荧光染料法(SYBR GreenⅠ) SYBR Green I是荧光定量PCR最常用的DNA结合染料,与双链DNA非特异性结合。在游离状态下,SYBR Green I发出微弱的荧光,但一旦与双链DNA结合,其荧光增加1000倍。所以,一个反应发出的全部荧光信号与出线的双链DNA量呈比列,且会随扩增产物的增加而增加。 SYBR Green I荧光染料与DNA双链
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