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(a) Stereoviews of the carbohydrate difference density (red) of domain D1 and D2 of the PV1-CD155 complex. The deglycosylated CD155 density and the viral surface are shown in green and blue, respectively. (b) The Cα backbone of CD155 D1 is shown in black. The orientation of the canyon is marked as north, south, and east.
