Semliki forest virus. The bowl of smoke is a 9 angstrom resolution density map from electron cryo-microscopy. The density map is sliced in half with colors from red to blue showing low to high density values on the cut surface. A capsid protein forming a shell inside this enveloped virus is shown in blue, green and pink. The virus structure is described in Mancini EJ, et al., Cryo-electron microscopy reveals the functional organization of an enveloped virus, Semliki Forest virus. Mol Cell. 2000 Feb;5(2):255-66.
The density map is EMD-1015 from the Macromolecular Structure Database. The Protein Data Bank model of the capsid is 1dyl.
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