varsha gautham wrote:
Hello  justin,

Am sorry to say that its not useful.But what i mean is that the rtp constructed manually is building up the polymer and generating topology files and gro files. But when i look into the gro file with vmd the connectivity between each of the monomer is not built.

VMD merely guesses the connectivity - there's none specified in a .gro file, which is purely a set of coordinates. A .top file defines a topology. If your input structure doesn't conform to VMD's heuristics, then it won't show a bond.

You can't judge the success of your .rtp construct without looking at the *topology* pdb2gmx produced.

That is my polymer consists of 10 monomer units with ben and primary amine unit as a block polymer.

How can i include the connectivity information between these two in a rtp file?I can include that in session called bonds. But how to do that??And i want some help regarding the workflow that is how gromacs interpreting each of the rtp, atp ,ffnb.itp,ffbon.itp??I want to know that in a sequential order.are there any materials available other than manual..If so please let me know

Try http://wiki.gromacs.org/index.php/.top_file and links thereon.

Mark
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