Efforts at NCMI include development of software tools for reconstruction and analysis of 3D density maps of macromolecular complexes. Analysis includes segmentation, fitting of known structures from X-ray crystallography, building of de-novo models into high-resolution maps, and assessment or validation of the 3D density maps and models. Current and past development efforts include:

• EMAN2 (​Tutorials)
  • Particle picking, 3D reconstruction, etc.
• Gorgon
  • Model building
• Segger
  • Segmentation, rigid fitting of models into density
• ModelZ
  • Measure and visualize the resolvability of structural features in density maps using fitted models. Features include secondary structure elements (α-helices, β-beta strands), and side chains.