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Recent Citations
Cryo-EM structure of the vaccinia virus entry fusion complex reveals a multicomponent fusion machinery. Lin CS, Li CA et al. Sci Adv. 2026 Jan 16;12(3):eaec0254.
Structural insights into the activation mechanism of the human metabolite receptor HCAR1. Gao M, Zang S et al. Sci Signal. 2026 Jan 6;19(919):eadw1483.
Crystal structure of Methanococcus jannaschii dihydroorotase with substrate bound. Vitali J, Nix JC et al. Acta Crystallogr F Struct Biol Commun. 2026 Jan 1;82(Pt 1):23-31.
Correlation between solvation free energy and solute-solvent interaction energy in energy representation theory. Maruyama Y, Matubayasi N. J Phys Chem B. 2025 Dec 25;129(51):13230-13241.
Structural snapshots capture nucleotide release at the μ-opioid receptor. Khan S, Tyson AS et al. Nature. 2025 Dec 18;648(8094):755–763.
Previously featured citations...Chimera Search
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December 25, 2025
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September 22, 2025
Mac users may wish to defer upgrading to MacOS Tahoe. Currently on that OS the Chimera graphics window is shifted so that it covers the command and status lines.
March 6, 2025
Chimera production release 1.19 is now available, fixing the ability to fetch structures from the PDB (details...).
Previous news...Upcoming Events
UCSF Chimera is a program for the interactive visualization and analysis of molecular structures and related data, including density maps, trajectories, and sequence alignments. It is available free of charge for noncommercial use. Commercial users, please see Chimera commercial licensing.
We encourage Chimera users to try ChimeraX for much better performance with large structures, as well as other major advantages and completely new features in addition to nearly all the capabilities of Chimera (details...).
Chimera is no longer under active development. Chimera development was supported by a grant from the National Institutes of Health (P41-GM103311) that ended in 2018.
Feature Highlight
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Interactive shadows (shadows that move as structures are moved) can be enabled in the Effects dialog or with the command set shadows. Click the image to show a small molecule rotating above a rectangular plane. This simple animation was made with the Chimera command script tumble.com. Interactive shadows also work with ribbons, surfaces, and other representations.
(More features...)
Gallery Sample
Peroxiredoxins are enzymes that help cells cope with stressors such as high levels of reactive oxygen species. The image shows a decameric peroxiredoxin from human red blood cells (Protein Data Bank entry 1qmv), styled as a holiday wreath.
See also the RBVI holiday card gallery.
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