protein mass spec problem

[Andrew Wallace]

John E. Fox wrote:
> 
> Electrospray Mass Spectrometry on a purified recombinant protein.
> Why multiple peaks?

Could they be different salts of the protein, e.g. Tris, Na+, etc.?
This is often observed with smaller peptides, for example.

Andrew
-- 
- note antispam feature in header. My real address is:
==================================================================
Andrew Wallace,Ph.D., Queens University Belfast,  N. Ireland (UK)   
a.wallace at qub.ac.uk   http://web.qub.ac.uk/bb/awpage/wallace.html   
==================================================================