[gmx-users] extract protein and counter ions from trajectory

[sarbani chattopadhyay]

Hi everybody,
                    I want to know is there any way to extract the coordinates of both the protein and 
counterions from the trajectory while writing the "pdb" file ie. I don't want the water molecules 
but only the protein and the counter ions. 
 I did not see that option wile trying to generate the pdb files.

Is there any way of doing this?

Thanks in advance

Sarbani
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