CNS or Crystallography and NMR system, is a software library for computational structural biology.[1][2] It is an offshoot of X-PLOR and uses much of the same syntax. It is used in the fields of X-ray crystallography and NMR spectroscopy of biological macromolecules.
References
^Brunger AT, Adams PD, Clore GM, Gros P, Grosse-Kunstleve RW, Jiang JS, Kuszewski J, Nilges M, Pannu NS, Read RJ, Rice LM, Simonson T, Warren GL (1998). "Crystallography & NMR System (CNS), A new software suite for macromolecular structure determination". Acta Crystallogr D. 54: 905–921. doi:10.1107/s0907444998003254. PMID9757107.