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LB Derivations

LB Broth

For 2 Liters:

  • 20 g. tryptone
  • 10 g. yeast extract
  • 20 g. NaCl
  • q.s. to 2 L w/ ddH2O
  • Adjust pH to 7.4 w/ NaOH
  • Autoclave 45 min.
  • Divide into 250 mL aliquots

LB Plates

  • 500 mL LB broth (pH 7.4)
  • 7.5 g. Noble Agar (15 g/L)
  • Divide into 2- 250 mL bottles
  • Autoclave 45 min.
  • Cool to 55oC in H2O bath
  • Add 500 uL ampicillin
  • Pour plates, store stacked. Good for 1 month.