Team:Cambridge/Protocols/SOB

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*Some formulations of SOB use 10 mM MgCl<sub>2</sub> and 10 mM MgSO<sub>4</sub> instead of 20 mM MgSO<sub>4</sub>.
*Some formulations of SOB use 10 mM MgCl<sub>2</sub> and 10 mM MgSO<sub>4</sub> instead of 20 mM MgSO<sub>4</sub>.
*Adjust to pH 7.5 prior to use.  This requires approximately 25 ml of 1M NaOH per liter.
*Adjust to pH 7.5 prior to use.  This requires approximately 25 ml of 1M NaOH per liter.
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Revision as of 18:23, 23 August 2012

A rich medium for cell growth

SOB

  • 0.5% (w/v) yeast extract
  • 2% (w/v) tryptone
  • 10 mM NaCl
  • 2.5 mM KCl
  • 20 mM MgSO4

Per liter:

  • 5 g yeast extract
  • 20 g tryptone
  • 0.584 g NaCl
  • 0.186 g KCl
  • 2.4 g MgSO4
  • Some formulations of SOB use 10 mM MgCl2 and 10 mM MgSO4 instead of 20 mM MgSO4.
  • Adjust to pH 7.5 prior to use. This requires approximately 25 ml of 1M NaOH per liter.