Colorimetric detection method based on exonuclease signal amplification
一种核酸外切酶、信号放大的技术,应用在比色检测领域,能够解决吸光度响应小、灵敏度低等问题,达到合成方法简单、稳定性好、实现信号放大的效果
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[0034] This embodiment is a colorimetric detection method based on exonuclease signal amplification. A partially complementary double-stranded DNA (dsDNA) probe is used as a recognition molecule. After the dsDNA probe interacts with the target, it becomes single-stranded DNA. Exo I can specifically hydrolyze the characteristics of single-stranded DNA, release the target molecule into the next round of reaction, and realize the signal amplification of the system. The process is shown in the appendix Image 6 shown.
[0035] The specific steps of the method are as follows:
[0036] In step 1, the dsDNA probe is used as a recognition molecule, and the dsDNA probe becomes single-stranded DNA after interacting with the target to be tested;
[0037] Step 2, utilize the characteristic of Exo I to specifically hydrolyze single-stranded DNA, release the target molecule to be tested into the next round of reaction, and then realize signal amplification;
[0038] Step 3, adding polycat...
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