Re: [ccp4bb]: monovalent cations in e-density

["Eleanor J. Dodson" <ccp4@ysbl.york.ac.uk>]

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David Buckler wrote:
> 
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> Dear All,
> 
> Maybe not CCP4-related, but I am seeking guidance on interpreting
> e-density that appears to arise from monovalent cations -- how to
> differentiate, e.g., Na+, K+, NH4+.  Any relevant references and/or
> programs would be appreciated.
> 
> Thanks in advance.
> 
> --
> 
> David R. Buckler


 A very much underused resource is the anom diffs. Providing you know
the wave length many of these give different height peaks in anomalous
maps phased on all other atoms
Eleanor