Thanks Mark for your response. These are steps I followed to construct DNA+Water molecules. ----> editconf -f A.pdb -o A.gro -d 0.3 ----> genbox -cp A.gro -cs -nice -20 -o A_water.gro I have not used any of the topology files (which I believed should be used in g_select) during the construction and I am not sure of handling it. Also, I ned to introduce some OH radicals also into the cylinder with some radius around the DNA. Could you guide me.
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