|CCCP (Coiled-coil Crick Parameterization)
This program generates coiled-coil structures based on specified Crick parameters[1-2]. Multiple structures can be generated that span a range of parameters. Contact gevorg.grigoryan at gmail dot com with bug reports and requests.
 F. H. Crick, "The Fourier Transform of a Coiled Coil", Acta Cryst., 6: 685 (1953)
 G. Grigoryan, W. F. DeGrado, "Probing Designability via a Generalized Model of Helical Bundle Geometry", J. Mol. Biol., 405(4): 1079-1100 (2011)