Mol* (/'molstar/) is a modern web-based open-source toolkit for visualisation and analysis of large-scale molecular data
Open Mol* Viewer Viewer Documentation Issues & Feedback
High-performance graphics and data handling of the Mol* Viewer allow users to simultaneously visualise up to hundreds of (superimposed) protein structures, play molecular dynamics trajectories, render cell-level models at atomic detail with tens of millions of atoms, or display huge models obtained by I/HM such as the Nuclear Pore Complex.
Interactive Examples
HIV in blood serum

CellPack model of enveloped HIV capsid with ~13M atoms.

Alpha orbitals and density of Atorvastatin

Alpha orbitals and density of Atorvastatin.


Zika virus assembly and Cryo-EM density.

P-450 Superposition

Superposition and validation annotation of P-450 cytochromes.

GAIN domain

GAIN domain tethered agonist exposure (doi:10.1016/j.molcel.2020.12.042). Based on an animation by Ramon Guixà-González.

HIV in blood serum

CellPack model of enveloped HIV capsid in blood serum with 60+M atoms.

Nuclear Pore Complex

IH/M structure of the Nuclear Pore Complex.


Render styles and lighting modes demonstration.

1RB8 Annotated Assembly

Annotated assembly of the phiX174 DNA binding protein (PDB id 1RB8).

Villin trajectory

Villin folding trajectory by Stefan Doerr (doi:10.6084/m9.figshare.12040257.v1).

SARS-CoV-2 Virion

SARS-CoV-2 Virion. Coarse-grained model by Alvin Yu et al. (doi:10.1016/j.bpj.2020.10.048).

BtuB molecules in a lipid bilayer

BtuB molecules in a lipid bilayer. Coarse-grained model by Matthieu Chavent et al. (doi:10.1038/s41467-018-05255-9).

bacterial flagellar motor-hook complex

Cryo-EM structure of the bacterial flagellar motor-hook complex (@Jiaxing_Tan_ et al. PDB 7CGO, doi:10.1016/j.cell.2021.03.057).

Read about Mol* in Nucleic Acids Research
When using Mol*, please cite:
David Sehnal, Sebastian Bittrich, Mandar Deshpande, Radka Svobodová, Karel Berka, Václav Bazgier, Sameer Velankar, Stephen K Burley, Jaroslav Koča, Alexander S Rose: Mol* Viewer: modern web app for 3D visualization and analysis of large biomolecular structures, Nucleic Acids Research, 2021; 10.1093/nar/gkab31.
In memory of Jaroslav Koča.
Join Development on GitHub
The Mol* toolkit provides a comprehensive solution for molecular data delivery, visualization and analysis that can be embedded into a wide range of 3rd party solutions. It includes a customizable plugin for high quality WebGL based molecular data visualization, as well as servers for model and experimental (X-ray, Cryo-EM, etc.) data delivery, efficient BinaryCIF data format support, and other exciting features.
The project is an open collaboration started by
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