NMRWish Built-In TCL Functions
dynGetPsi: Get the protein backbone torsion angle psi N(i) CA(i) C(i) N(i+1) for selected residues.

Flag Argument Default Description  -src pdbSrc Source of Structure Data.  -res resList\} Residue ID List.  -chain cName Chain Name.  -seg sName Seg Name.  -round rVal Round Angles to Nearest rVal. Notes:   Psi(i) Torsion: N(i) CA(i) C(i) N(i+1)   Return values adjusted to range -180 to 180.