Prbbbb:inclusion body solubilization v1

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Revision as of 01:10, 26 August 2009 by Raik (talk | contribs) (Notes)
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This protocol describes how to re-dissolve the insoluble fraction of an E. coli protein expression for purification on His-Trap columns. It picks up where the expression protocol ends.

See also:


buffer I (for purification on His-Trap columns)

  • 50 mM HEPES (pH 7.4)
  • 0.5 M NaCl (high salt)
  • 5 mM DTT (reducing conditions)
  • 8 M Urea (chaotropic, unfold proteins)
  • 1% v/v Triton X-100 (detergent, help solubilization of hydrophobic peptides)
  • 20 mM Imidazole (for reducing unspecific binding on the column)


starting point: pellet of your insoluble fraction (after 40 min high-speed cold-room centrifugation of the lysate)

  1. add 500 µl buffer I to the pellet
  2. resuspend by pipetting or 2 times 5-10 s vortexing
  1. boil and load 5 µl + loading buffer on a SDS PAGE gel


Please feel free to post comments, questions, or improvements to this protocol. Happy to have your input!

raik:share your experience!



or instead, discuss this protocol.