UCSF Chimera
UCSF Chimera


UCSF Chimera free download for Mac

UCSF Chimera

19 September 2018

Program for visualization and analysis of molecular structures.


UCSF Chimera is a highly extensible program for interactive visualization and analysis of molecular structures and related data, including density maps, supramolecular assemblies, sequence alignments, docking results, trajectories, and conformational ensembles. High-quality images and animations can be generated. Chimera includes complete documentation and several tutorials, and can be downloaded free of charge for academic, government, nonprofit, and personal use.

What's new in UCSF Chimera

Version 1.13.1:
  • Updated CASTp fetch URL
  • Serial-numbering option for saving very large PDB files
  • Additional Tools menu to facilitate getting third-party plugins, notably the Tangram suite of molecular modeling tools from InsiliChem
  • Rotamers (Structure Editing) - Dunbrack backbone-dependent rotamer library updated to 2010 version
Command Changes:
  • swapaa - Dunbrack backbone-dependent rotamer library updated to 2010 version
  • tile - label option adds 2D labels showing each tiled model's number and name
  • write - serial-numbering option for saving very large PDB files
  • Modeller input preparation sometimes failed when the template chain contained a modified amino acid (a HETATM residue)
  • Bogus "file does not exist" dialog no longer appears
  • MD Simulation's "incompatible files" problem when restarting a trajectory computation
  • Align Chain Sequences tool
  • Problem with using rotamers of proline from the Dunbrack 2010 rotamer library
  • Support independent rotation in Animation scenes
  • Problem with mis-identified element types in new Amber trajectories
  • H-bond-guided hydrogen addition was wrongly ignoring certain hydrogen bonds when structures were being treated in isolation

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App requirements: 
  • Intel 64
  • OS X 10.8.0 or later
Developer Website: 
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