AMBER: dihedral term in prmtop file

From: Ye Mei <ymei.itcc.nju.edu.cn>
Date: Thu, 28 Jul 2005 22:38:55 +0800

Dear amber users

I feel puzzled with the negative term in the FLAG "DIHEDRALS_INC_HYDROGEN", like
      15 12 18 21 1 15 12 -18 21 2
      12 18 24 27 3 9 3 12 15 10
       9 3 -12 15 11 9 3 12 18 3
       6 3 12 15 10 6 3 -12 15 3
       6 3 -12 15 11 6 3 12 18 3
       3 12 18 21 2 0 3 12 15 10
       0 3 -12 15 3 0 3 -12 15 11
Would anybody tell me what the negative terms represent?
      
                                 
Best regards,

Ye Mei
ymei.itcc.nju.edu.cn
Institute of Theoretical and Computational Chemistry
Key Laboratory of Mesoscopic Chemistry
School of Chemistry and Chemical Engineering
Nanjing University
Nanjing 210093
P.R.China
2005-07-28

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Received on Thu Jul 28 2005 - 15:53:01 PDT
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