NH4+ vs. H2O

Pete Dunten dunten at sol.bmc.uu.se
Thu Apr 14 15:01:20 EST 1994


Imagine you are interpreting an electron density map for a 
new protein crystallized from ammonium sulfate.  And you're
at the stage of adding water molecules.  How do you decide
whether you have a water, or an ammonium ion close to a
carboxylate on the protein?  




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