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Preparing Glycerol Stocks

Reagents and Materials

  • Overnight bacterial growth
  • Screw Cap Tubes
  • Glycerol


  1. Pipet 0.5mL of 50% glycerol into 3 1.5mL screw cap tubes
  2. Add 0.5mL of overnight culture to each tube.
  3. Pipet up and down to gently mix.
  4. Flash freeze in liquid N2 or dry ice/ethanol bath.
  5. Place in -80°C freezer when frozen.