*** For details on how to be removed from this list visit the *** *** CCP4 home page http://www.ccp4.ac.uk *** Dear All How do I get the program 'ACT' to identify my water molecules in my pdb, at present they are labelled ATOM 4536 O HOH W xxxxx yyyyy zzzzz 1.00 20.00 I've looked at the source code HOH should do it, but it just don't Hope someone can help Mike.