On Fri, 1 Dec 2006, William Scott wrote:
Is there any reasonable way to distinguish between a water molecule and an
ammonium ion in a crystal structure at 2 Å resolution?
(Plausible hydrogen bonding schemes can be invoked in which this peak donates
either two or four hydrogens for hydrogen bond formation.)
If that's the case, then you probably have a mixture of both entities
present.
[And off topic: It would not be a bad time to learn about and apply
your mail filtering options wrt Swan ccp4bb :) ]
