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Cryo-EM reconstructions of CHIK-VLP in complex with Fab fragments of neutralizing antibodies looking down a 2-fold axis. One icosahedral asymmetric unit is outlined in white. The surface of the complex is colored according to its distance from the center of the virus as given by the inset scale in angstroms. Thus, the Fab fragment bound to the surface of the virus is blue, since it is at a greater distance from the center of the virus.
