спина колонка

Sample: 50-300ml bacterial culture Format: ion-exchange rasin column Operation: gravity-flow Binding capacity: 200μg/500μg Purity: equity to that obtained by 2x CsCI-gradient centrifugation Operation time: 120 minutes Applications: transfection Microinjection Restriction digestion Plasmid Midi/Maxi Kits uses pre-packed anion-exchange rasin column to purify plasmid or cosmid DNA from bacterial cultures. In the process, the modified alkaline lysis method and RNase treatment are used for creating cleared cell lysate with minimal genomic DNA and RNA contaminas. By a gravity-flow procedure, the plasmid DNA in cr;ude lysate has beeen bound to the column. The contaminants can be washed off with the wash buffer. Finally, the purified plasmid DNA is eluted by a high salt uffer and then precipitated with isopropanol for desalting. The entire procedure can be completed in 2 hours without ultracentrifuges and HPLC or other toxic reagents.