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(JSV) 染料法荧光定量RT-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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文献和实验新型冠状病毒背景介绍与核酸检测整体解决方案分享，从核酸模板制备到 RT 实验策略，再到 qPCR 实验解析与应用。
了我的扩增曲线呢？ 其实，这种现象并不是偶发的，有很多原因可能导致，并且有个专属名称「Hook Effect」，翻译过来叫「鱼钩效应」。「鱼钩效应」指在荧光定量 PCR 过程中，DNA 扩增到指数增长期后出现的一种荧光信号不能保持稳定（或者上升）而出现下降的现象 [1]。 导致扩增曲线出现这一现象的因素比较复杂，这里我们分别从嵌入性染料法与探针法两种定量方式的角度为大家解释： 嵌入性染料法： 嵌入性染料法（例如 SYBR Green I）产生「鱼钩效应」主要是由于模板序列混杂，在 PCR
，我们只需先将软件打开，通过主界面的 Template 按钮导入 edt 模板文件即可（图 1，绿色方框），该方法既能节省时间又可以保证实验运行正常。 图 2 双击 edt 模板文件运行实验导致 JAVA 报错实验中断 Part 2：Experiment Properties 的选择 当我们选择新建一个实验时，第一步需要完成 Experiment Properties 的设置。在这里我们为所运行的实验设置实验名，根据实验目的确定实验类型，基于所用荧光标记策略选择荧光定量方法是探针法还是染料法
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