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. 1999 Aug;73(8):6821–6830. doi: 10.1128/jvi.73.8.6821-6830.1999

FIG. 3.

FIG. 3

Comparison of hexons in VP26− capsids and VP5-VP19C particles. The outer (A and B) and inner (E and F) views of the hexon environment in VP26− capsids and VP5-VP19C particles, respectively, are shown. The triangles denote local threefold positions that are occupied by connecting densities. That between the central hexon and the hexons labeled 1 and 6 denotes the strict icosahedral threefold position. The yellow circles in panels A and B highlight the connecting masses between two adjacent hexons. The black circles highlight regions where the capsid floor is present in the VP26− capsid (E) but absent in the VP5-VP19C particle (F). (C and D) Contour plots of 5-Å-thick slices taken at 25 Å below the uppermost part of each type of hexon, which reveal the contrast between the sixfold symmetry in the VP26− hexon (C) and the skewed nature of the subunits in the VP5-VP19C hexon (D). The densities are color coded according to the capsid radius, as indicated by the color bars.