reference single.rst7 trajin prod.nc center rms backbone first out ptraj_prod.dat :4-7 rms first out ptraj_prod.dat :12-15&!@H= dihedral Phi_3-4 :3@C :4@N :4@CA :4@C out ptraj_prod.dat dihedral Psi_4-5 :4@N :4@CA :4@C :5@N out ptraj_prod.dat dihedral Phi_4-5 :4@C :5@N :5@CA :5@C out ptraj_prod.dat dihedral Psi_5-6 :5@N :5@CA :5@C :6@N out ptraj_prod.dat dihedral Phi_5-6 :5@C :6@N :6@CA :6@C out ptraj_prod.dat dihedral Psi_6-7 :6@N :6@CA :6@C :7@N out ptraj_prod.dat dihedral Phi_6-7 :6@C :7@N :7@CA :7@C out ptraj_prod.dat dihedral Psi_7-8 :7@N :7@CA :7@C :8@N out ptraj_prod.dat dihedral PhiS_4 :12@O5 :12@C1 :4@OG1 :4@CB out ptraj_prod.dat dihedral PsiS_4 :12@C1 :4@OG1 :4@CB :4@CA out ptraj_prod.dat dihedral PhiS_5 :13@O5 :13@C1 :5@OG1 :5@CB out ptraj_prod.dat dihedral PsiS_5 :13@C1 :5@OG1 :5@CB :5@CA out ptraj_prod.dat dihedral PhiS_6 :14@O5 :14@C1 :6@OG1 :6@CB out ptraj_prod.dat dihedral PsiS_6 :14@C1 :6@OG1 :6@CB :6@CA out ptraj_prod.dat dihedral PhiS_7 :15@O5 :15@C1 :7@OG1 :7@CB out ptraj_prod.dat dihedral PsiS_7 :15@C1 :7@OG1 :7@CB :7@CA out ptraj_prod.dat go