{"id":4499,"date":"2024-09-28T17:58:50","date_gmt":"2024-09-28T09:58:50","guid":{"rendered":"https:\/\/opentrons.com.cn\/news\/\/"},"modified":"2024-09-28T18:00:30","modified_gmt":"2024-09-28T10:00:30","slug":"pcrfanyingyechuli","status":"publish","type":"post","link":"https:\/\/opentrons.com.cn\/en\/news\/pcrfanyingyechuli\/","title":{"rendered":"PCR reaction solution components and processing"},"content":{"rendered":"<!-- wp:paragraph -->\n<p>In the field of molecular biology, PCR (polymerase chain reaction), as a powerful technical tool, is widely used for DNA amplification and detection. As for the PCR reaction solution, as the core carrier of this technical process, the accuracy and scientificity of its composition are directly related to the success or failure of the PCR experiment. Today, we will delve into the main components of the PCR reaction solution and reveal how these key elements work together in the PCR reaction to jointly promote the accurate amplification of DNA.<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:image {\"id\":4501,\"width\":\"560px\",\"height\":\"auto\",\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\n<figure class=\"wp-block-image size-full is-resized\"><img src=\"https:\/\/opentrons.com.cn\/wp-content\/uploads\/2024\/09\/image-59.png\" alt=\"PCR\u53cd\u5e94\u6db2\u6210\u5206\u53ca\u5904\u7406\" class=\"wp-image-4501\" style=\"width:560px;height:auto\"><\/figure>\n<!-- \/wp:image -->\n\n<!-- wp:paragraph -->\n<p>1. The main components of the PCR reaction solution 1. The role of template DNA: the starting material for PCR amplification, including the target sequence to be amplified. Requirements: It can be single-stranded or double-stranded DNA, but a certain degree of purity and integrity should be ensured. For clinical testing specimens, quick and easy methods are often used to extract nucleic acids as templates. 2. Specific primer function: Artificially synthesized oligonucleotide fragments are used to specifically recognize and bind to the target sequence on the template DNA, and guide the DNA polymerase to extend the chain. Design principles: The length is generally 15-30 bases, and the commonly used length is about 20bp. The G+C content is preferably 40-60%, and avoid continuously arranged purines or pyrimidines. Avoid complementarity between internal secondary structures and primers, especially at the 3' end, to prevent the formation of primer dimers. The 3' end bases should be strictly paired to improve amplification efficiency. 3. The role of thermostable DNA polymerase (such as Taq DNA polymerase): catalyzes the extension of DNA chains in PCR reactions. Features: It has high thermal stability and can maintain activity under the high temperature denaturation conditions of PCR. Dosage: Generally, 2-4U of enzyme is added to the reaction system. The specific dosage needs to be adjusted according to the experimental conditions and enzyme activity. 4. The role of four kinds of dNTPs (deoxynucleoside triphosphates): as raw materials for DNA synthesis, they are incorporated into newly synthesized DNA chains under the catalysis of DNA polymerase. Concentration: Commonly used concentrations are 50-200\u03bcM, and the concentrations of the four dNTPs should be equal to ensure the balance and efficiency of the PCR reaction. 5. PCR reaction buffer function: Provides the pH value and ionic environment required for PCR reaction, as well as necessary cofactors (such as Mg^2+). Features: The concentration of Mg^2+ has a significant impact on the specificity and yield of the PCR reaction and needs to be optimized according to experimental conditions.<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p>2. Opentrons OT-2 automated pipetting robot handles PCR reaction solutions 1. Core functions: OT-2 is a desktop-level automated pipetting platform with hardware modularity, flexibility and customizability, and can automate many common applications. . When debugging the PCR reaction solution, OT-2 can accurately distribute and mix various reaction components, such as template DNA, primers, dNTPs, buffers and Mg^2+, etc., thereby ensuring the accuracy and consistency of the PCR reaction solution. 2. Pipetting accuracy: When OT-2 absorbs 1 ul of liquid, the accuracy CV value is \u00b15%. This accuracy is comparable to pipetting equipment on the market that is ten times more expensive. Therefore, when debugging PCR reaction solutions, OT-2 can ensure accurate distribution of each component and reduce human errors. 3. Modular design: The plate modular design of OT-2 allows users to freely combine different functional modules according to their needs, such as temperature control module, magnetic bead purification module, etc. When debugging the PCR reaction solution, users can install a temperature control module to control the reaction temperature as needed to ensure that the PCR reaction is performed under the correct temperature conditions. 4. Temperature control module: The temperature control module is one of the functional modules specially designed by Opentrons for OT-2, which is used to accurately control the temperature of the reaction system. In PCR reactions, temperature control is crucial because PCR reactions require three steps of denaturation, annealing, and extension under specific temperature conditions. The temperature control module can ensure that these steps are performed within the correct temperature range, thereby ensuring the success rate of PCR reactions and product quality.<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p>Opentrons mainly uses its automated pipetting robot OT-2 and supporting temperature control modules and other functional modules when debugging PCR reaction solutions. These devices work together to ensure the precise preparation of PCR reaction solutions and the success of PCR reactions.<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p>Related reading<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><a href=\"https:\/\/opentrons.com.cn\/knowledge2\/heating-oscillation-module\/\">Heating oscillation module introduction<\/a><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><a href=\"https:\/\/opentrons.com.cn\/knowledge2\/single-channel-pipette\/\">User Manual: Opentrons Single Channel Pipette<\/a><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><a href=\"https:\/\/opentrons.com.cn\/knowledge2\/opentrons-flex-2-2\/\">Introduction to Opentrons Flex\u2122 Ring Magnetic Module<\/a><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><a href=\"https:\/\/opentrons.com.cn\/news\/huangxingcilijia\/\">The working principle of the ring magnetic stand<\/a><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><a href=\"https:\/\/opentrons.com.cn\/news\/zidongfenyegongzuozhan\/\">Automatic dispensing workstation<\/a><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><a href=\"https:\/\/opentrons.com.cn\/news\/ot-2gongzuozhandanbaizhiceding\/\">Protein quantitative determination of OT-2 workstation<\/a><\/p>\n<!-- \/wp:paragraph -->","protected":false},"excerpt":{"rendered":"<p>In the field of molecular biology, PCR (polymerase chai [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":4501,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[37],"tags":[],"class_list":["post-4499","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.4 - 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