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From 2013.igem.org

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Revision as of 20:27, 27 September 2013

Materials

• Chemically Competent Cells -20 µL
• PCR machine
• 10% BME ( beta mercaptoethanol ) - 0.88 µL
• SOC media - 222 µL
• Pipette tips with cut ends ( To decrease the amount of cells destroyed during the transferring and resuspending procedure)
• Plates with appropriate antibiotic (if stored in fridge, place in incubator before doing the transformation so that the plates are warm when it's time to plate)

Procedure

• Transfer 20 µL chemically competent cells from -80°C freezer to a PCR tube using a cut pipette tip
• Thaw competent cells over ice --> They should NOT be taken from above 4°C freezers)
• Thaw 10% BME - 0.88 µL (Must be completely thawed)
• Add 10% BME to the PCR tube with the competent cells

• Incubate on ice for 10 min
• Add 2 µL of purified plasmid
• Incubate the PCR tube in the PCR machine with HEATSHOK program in the lab 0245. See HEATSHOK protocol Here.
• Add 222 µL of SOC to fill to a total volume of 250 µL when the PCR machine is holding at 4°C
  • Be sure to sterilize the bottle with EtOH, and not contaminate the media when loading it into the heat cycler
• Plate 20 µL and 200 µL from each tube using the spreaders on LB/agar plates with the appropriate antibiotic
• Leave plates at 37°C overnight.