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Listeria monocytogenes

Resuspend the cells in ice-cold electroporation solution (0.0025 vol.). Use cells within 30 minutes of their preparation.

Electroporation of cells:

  1. Add 1 g plasmid DNA to 100 l of electrocompetent cells. Homogenize by gently mixing with pipette several times. Transfer mixture into a prechilled cuvette.
  2. Wipe moisture from the cuvette and insert the cuvette into the device.
  3. Electroporation:

    Mode Prokaryotes O Voltage (V) 1,000 V Time constant (T) 5 ms
  4. Immediately add 1 ml of BHI medium and incubate at 37 C for one hour.
  5. Plate cells on selective BHI plates.
Expected Results: Transformation efficiency up to 4 x 106 transformants/g of DNA.


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