[gmx-users] plus and minus signs in rtp files

Joan Clark Nicolas joan.clark88 at gmail.com
Mon Nov 2 13:04:40 CET 2015

Dear gmx users,
I am triying to add a new residue to the aminoacids.rtp file and I found
some plus and minus signs that I don't know what to do with. For example,
for the ASP, we have these:

[ bonds ]
    -C     N
[ impropers ]
    -C    CA     N     H
    CA    +N     C     O

Can you tell me what this signs mean and what rules I have to follow to put

Thank you very much!

*Joan Clark i Nicolas*

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