Insect supernatant inducing color change in Talon resin?

[Aldert Zomer]

vladimir vigdorovich wrote:
> 
> Hi, I am trying to optimize a purification procedure of a His-tagged
> protein derived from Hi5 cells using Talon resin. When I apply clarified,
> pH-adjusted (to ~8.0), buffered (supplemented with 20 mM Tris-HCl) supe to
> the column, it slowly changes color to whitish-pink and the flowthrough
> darkens. Some protein binds but I suspect that much ends up in
> flowthrough.
> Can anyone verify my suspicions that Co2+ is being leeched and/or suggest
> a remedy?
> Thanks,

Is there some EDTA in your supe?


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Ing. Aldert Zomer,                      | Tel: +31 50 36 32 360
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IMEnz Bioengineering,                   | Email: zomeral at biol.rug.nl
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