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Revision as of 17:56, 2 July 2012 by Janet B. Matsen (talk | contribs) (E. Coli)
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General Lab:

Cell Culture:




E. Coli

Electrocompetent Cells

  • You can make your own electro-competent cells for electroporation.
    • From Amada's past mentor in undergrad:
      • Grow the cells overnight
      • Inoculate from this the next morning: generally use 200 uL/50 mL
      • Let grow for about 3-4 h (OD 0.4-0.6 or so), then centrifuge and wash 3 times with 10% glycerol (everything on ice).
      • Resuspend the pellet in a small volume (Example, if I do a 5 ml culture I try to resuspend the final pellet in no more than 0.2 or 0.3 ml of 10% glycerol). Then split in 1.5 ml centrifuge tubes (0.1 ml in each), freeze on dry ice-isopropanol and store at -80C.
        • Note: you can dilute your re-suspension, measure OD, and calculate the cell concentration if you care. See this page. Would allow you to calculate efficiency.