[gmx-users] Residues in rtp file

[Dibyajyoti]

Dear all,

Can you please mention where I can get the naming conventions for 
gromos53a6 residue types?
Specially I want to know about what residues with a * mean, like below 
NADPH reidues in aminoacids.rtp file. Thanks a lot for the revert.

  NO5*    OA    -0.36000     1
  AC5*   CH2     0.00000     2
  AC4*   CH1     0.16000     3
  AO4*    OA    -0.36000     3
  AC1*   CH1     0.20000     3

Thanks and Regards,
Dibyajyoti Das.