[gmx-users] Tcl script

[varsha gautham]

I just now started with TCL scripting.And it will be helpful if  someone
tell me how to write a TCL script for the following queries.?

Given a ubiquitin protein ,

1.what is the end-to-end distance ( c-terminal and N-termnal) distance of
ubq and how does it change with time?
2. what is the total charge of the protein?
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