The isolation and purification of plasmid DNA in modern times is represented by isolation from E. coli. In view of the important position of E. coli in molecular biology research, the isolation and purification of quality control DNA (Piasmid DNA) from E. coli has become an An important subject in centrifugal technology. The rapid separation and purification of plasmid DNA has put forward higher requirements for ultracentrifuge equipment (ultracentrifuge, rotor and auxiliary equipment).
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