The cone-shaped HIV capsid is composed of about 1,300 copies of the protein p24 arranged into a hexamer coat (blue) with p24 dimers and trimers (orange) linking each hexamer unit. Approximately 4.2 million atom are modeled.

Credit: Juan R. Perilla and the Theoretical and Computational Biophysics Group, University of Illinois at Urbana-Champaign

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