title: Calculation of helix packing angles in protein structures.
abstract: Software is presented for the calculation of packing angles and geometry of helical secondary structure elements in protein structures.
  
  
  BACKGROUND
  C language source code and documentation is available from http://www.bioinformatics.leeds.ac.uk.
authors.affiliation: School of Biochemistry and Molecular Biology, University of Leeds, Leeds, West Yorkshire LS2 9JT, UK.
authors.forename: James A R
authors.initials: JA
authors.lastname: Dalton
authors.forename: Ioannis
authors.initials: I
authors.lastname: Michalopoulos
authors.forename: David R
authors.initials: DR
authors.lastname: Westhead
mesh_terms: D000465:Algorithms; D003461:Crystallography / Q000379:methods*; D008958:Models, Molecular; D011381:Programming Languages; D011487:Protein Conformation; D017510:Protein Folding; D017433:Protein Structure, Secondary; D011506:Proteins / Q000737:chemistry*; D012984:Software
chemical_list: D011506:Proteins