How to show protein interaction?

[Andy Phillips]

Thorsten Schmidt wrote:
> 
> Dear Reader!
> 
> I have a protein and I just want to test if it forms dimers, trimers etc.?
> (The protein was purified by HisTag-Chromatographie and is in solution
> (20mM Tris, 0,5 M NaCl, 1 M Imidazol))
> What is the simplest way to do this?
> 
> Thank you for your answer
> 
> Thorsten Schmidt

How about electrospray ionization mass spectroscopy (ESI-MS)?

See "Preservation of Noncovalent Associations in Electrospray Ionization 
Mass-Spectrometry - Multiply Charged Polypeptide and Protein
Dimers" Smith, R. D., Lightwahl, K. J., Winger, B. E. and Loo, J. A., Org. Mass 
Spectrom., 1992, 27, 811-821 

Andy
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