PHENIX is a software suite for the automated determination of macromolecular structures using X-ray crystallography and other methods.
The Graphical User Interface to Phenix can be used to visualize the results of the analyses. It can be run on a gui node.
If you publish research that uses phenix you have to cite it as follows:
PHENIX: a comprehensive Python-based system for macromolecular structure solution. P. D. Adams, P. V. Afonine, G. Bunkóczi, V. B. Chen, I. W. Davis, N. Echols, J. J. Headd, L.-W. Hung, G. J. Kapral, R. W. Grosse-Kunstleve, A. J. McCoy, N. W. Moriarty, R. Oeffner, R. J. Read, D. C. Richardson, J. S. Richardson, T. C. Terwilliger and P. H. Zwart. Acta Cryst. D66, 213-221 (2010).