SERVA Electrophoresis
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50 years of experience in the supply of quality reagents at SERVA provides expertise in manufacture, development and distribution of products worldwide. This know-how is the platform for outstanding customer service - all you need to succeed. Our mission is to bring innovative products to the life sciences market, meeting our customers needs. Technical competence and total quality management are the basis for continuous improvement. We pursue the highest standards in product quality, workplace safety and responsibility for the environment we live in. We dedicate our capacity and integrity to guarantee consistent product performance and continuity of supply. We are certified for ISO 9001:2000.
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![Total RNA extraction - Precipitation](https://www.clinisciences.com/it/upload/organic-egdjr2.png)
Total RNA extraction - Precipitation
The most common organic extraction is the method using phenol-chloroform solution
Phenol extraction is a commonly used method for removing proteins from a DNA sample, e.g. to remove proteins from cell lysate during genomic DNA preparation.
Organic extraction involves the addition of and incubation in multiple different chemical solutions; including a lysis step, a phenol chloroform extraction, an ethanol precipitation, and washing steps.
Samples are homogenized in a phenol-containing solution and then centrifuged after chloroform addition. During centrifugation, the sample separates into three phases: an upper aqueous phase which contains RNA, an interface containing DNA, and a lower organic phase containing proteins and lipids.
The advantage of the phenol-chloroform method is the simplicity of the protocol, the rapid denaturation of nucleases and the stabilization of nucleic acids. The main disadvantage is the use of toxic chemicals phenol and chloroform, and there is an increased risk of contamination due to transferring the DNA between multiple tubes.
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- Buffers and reagents 11
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