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12-Fold symmetry of the HSV-1 B capsid portal. (a) External view of the portal density extracted from the c1 map (Fig. 2a) showing 12 radially arranged densities. (b) Rotational correlation of an annulus of data from the c1 reconstruction shown in panel a confirms the 12-fold arrangement of the portal. (c) The c12 average of the portal density shown in panel a sitting within the HSV-1 B capsid shell. Side, external, and oblique views are shown.
