chelex -100 column

[Gabriel Akopian]

	Recently we ran calmodulin through a chelex column without  
buffering the protein or the column...We're having two problems; (1) is  
the column pH is at about 10-11 and is practically impossible to  
lower...so our protein is in a very basic medium, and (2) we're having  
trouble removing calcium from the calmodulin.  With each subsequent pass  
through the column, we're lowering the calcium concentration but it is  
taking several passes to accomplish this...Can anyone give any advice or  
comments.