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| 3 | Developed since 2002, [https://phenix-online.org/about Phenix] is a comprehensive software package for macromolecular structure determination for crystallographic and electron cryo-EM data. Features include: |
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| 5 | Automation:: Able to construct initial model without human intervention given reasonable starting data. Available via GUI or command line. |
| 6 | Ligand fitting:: In addition to automated fitting of known ligands, can identify ligands from a difference map. Refinement parameters for ligands not in its monomer library can be developed through through its electronic ligand builder and optimization workbench (eLBOW). |
| 7 | Programmable:: Built on C++/Python, many fundamental objects/functions provided by Computational Crystallography Toolbox (cctbx) and scriptable from there. Moving to Python 3. |
| 8 | Broad/diverse development team:: Current groups: Paul Adams (LBL); Tom Terwilliger (LANL); Randy Read (Cambridge); David and Jane Richardson (Duke) |