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need help with gst-tagged protein-purification

protein purification elution

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#1 yourGrandma



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Posted 06 June 2012 - 04:57 AM

hey guys!

i have a problem.

i expressed a protein in insect cells and now try to purify it. it is gst tagged and has a molecular weight of 120kDa.
everything works just fine but i am not able to elute the protein. if i check via westernblot it is still located on the glutathion-sepharose-beads.
i tried with an elution-buffer containing 40mM Glutathion.
do you have an advice for me?

thanks a lot!

#2 xabiarias



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Posted 06 June 2012 - 05:03 AM

try to modify the pH and ionic strenght in the elution buffer...

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