[gmx-users] Why NaCl and KCl solution?

Justin A. Lemkul jalemkul at vt.edu
Sat May 23 20:13:08 CEST 2009

Chih-Ying Lin wrote:
> HI
> 1. Would you please tell me the reason that "generally people use NaCl
> or KCl in the solution with protein"?
> 2. Why does PDB file of the protein NOT Carrying ions?

PDB structures do not contain information about the properties of the solvent or 
precipitant used to obtain the structure.  Occasionally some additive (glycerol, 
etc.) will be present since it is bound to the protein.  Some background on 
X-ray crystallography or NMR will explain structure determination.


> Thank you
> Lin
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Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080


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