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Gel electrophoresis uses a gel as an anticonvective medium or sieving medium during electrophoresis. Gels suppress the thermal convection caused by the application of the electric field and can also simply serve to maintain the finished separation so that a post electrophoresis stain can be applied. [ 3 ]
An example Gel documentation system, showing the results of gel electrophoresis on a connected monitor.. A gel doc, also known as a gel documentation system, gel image system or gel imager, refers to equipment widely used in molecular biology laboratories for the imaging and documentation of nucleic acid and protein suspended within polyacrylamide or agarose gels.
Electrophoresis apparatus: used to detect and classify serum proteins or proteins from any other source; also used for DNA separation Chromatography: • Gas chromatography or Gas liquid chromatography (GLC) • Planar chromatography • Paper chromatography • Thin layer chromatography • Affinity chromatography • Ion exchange chromatography
For fluorescent dyes, after electrophoresis the gel is illuminated with an ultraviolet lamp (usually by placing it on a light box, while using protective gear to limit exposure to ultraviolet radiation). The illuminator apparatus mostly also contains imaging apparatus that takes an image of the gel, after illumination with UV radiation.
The gel piece containing the fragment is excised (cut out from the whole gel) and placed in a dialysis bag with buffer. Electrophoresis causes the DNA to migrate out of the gel into the dialysis bag buffer. The DNA fragments are recovered from this buffer and purified, using phenol–chloroform extraction followed by ethanol precipitation. This ...
Agarose gel Tray with a stack consisting top down of a weight, paper towels, membrane of nitrocellulose or nylon, gel, salt solution and a slab of glass. Southern blot membrane after hybridization and rinsing. Southern blot agarose gel under ultraviolet illumination. Southern blot autoradiogram.
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