Fig. 1.

The 5-fold-averaged cryoEM structure of PBCV-1 viewed down a quasi-2-fold axis. (A) Hexagonal arrays of major capsomers form trisymmetrons and pentasymmetrons (yellow). The unique vertex with its spike structure is at the top. Capsomers in neighboring trisymmetrons are related by a 60° rotation, giving rise to the boundary between trisymmetrons. (B) Central cross-section of the cryoEM density. (Scale bar: 500 Å.) (C) The same view as in B but colored radially, with red density being within 680 Å, yellow between 680 and 745 Å, green between 745 and 810 Å, light blue between 810 and 880 Å, and dark blue greater than 880 Å. Note the typical lipid low-density gap surrounding the red nucleocapsid density.