title: A program for the computation of helical parameters from internal coordinates.
abstract: A method for the calculation of helical parameters from internal coordinates of an arbitrary repeat unit, has been implemented in a FORTRAN IV program. The coordinates of all atoms in a cylindrical coordinate system are also obtained.  An application of the program for a systematic approach to the problem of protein-DNA recognition is introduced.
mesh_terms: D003201:Computers; D004247:DNA; D004151:Dipeptides; D008968:Molecular Conformation; D009690:Nucleic Acid Conformation; D011487:Protein Conformation
chemical_list: D004151:Dipeptides; D004247:DNA