Figure 4.

Ribbon diagram (38) of the capsid-binding d1 domain of Pvr (cyan), with β-strands labeled, juxtaposed with segments of the capsid proteins with which it is inferred to interact. The viral segments are shown as tubes, with VP1, blue; VP2, yellow; and VP3, red. Residue numbers are provided as landmarks. Black balls and colored numbers denote amino acids implicated by genetic analysis in receptor binding. Similarly, Pvr residues shown by mutation to be important for virus binding are listed (Left). The axes allow this view to be related to Fig. 3d.