Mark's suggestions were complete. However, you did not follow them. Please follow all of his suggestions and then post back with exactly what you did and exactly what problem you ran into. If you are having trouble with g_select, then show us what you did and why it didn't work. The mailing list should be used in addition to, not as a substitute for, reading the manual and testing it out yourself.
Chris. -- original message -- 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. With regards, Satya. -- gmx-users mailing list gmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users * Only plain text messages are allowed! * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search before posting! * Please don't post (un)subscribe requests to the list. Use the www interface or send it to gmx-users-requ...@gromacs.org. * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists