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. Chimera is developed by the Resource for Biocomputing, Visualization, and Informatics (RBVI), supported in part by the National Institutes of Health (P41-GM103311).

UCSF ChimeraX (or simply ChimeraX) is the next-generation molecular visualization program from the RBVI, following UCSF Chimera.

Feature Highlight

Chemical Knowledge

• determination of atom types in arbitrary molecules, including non-standard residues
• ability to add hydrogen atoms
• high-quality hydrogen bond identification
• selection of atoms/bonds by element, atom type, functional group, amino acid category
• interactive bond rotation, distance and angle measurements

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Gallery Sample

Binding Site Similarity

β-1,4-glycanase (gold, PDB 1exp) and cellobiohydrolase I (cyan, PDB 1cel) have similar glucose-binding sites but different folds. Ribbons were slimmed with Ribbon Style Editor and the title and captions were added with 2D Labels (see image how-to). (More samples...)