Fig. 2.

CryoEM reconstruction of Mimivirus applying only fivefold symmetry averaging. a–c Surface-shaded rendering of cryo-EM reconstruction of Mimivirus. a View onto the starfish-shaped feature associated vertex. b, c Views from opposite sides of the starfish-associated vertex. d The starfish-associated vertex removed to show the internal nucleocapsid with its concave surface facing the special vertex. e Central slice of the reconstruction viewed from the side of the particle showing the concave face of the nucleocapsid and the low-density space beneath the starfish-associated vertex. A perfectly icosahedral particle is outlined in gray to show the extension of the unique vertex. f Central slice of the reconstruction viewed along the fivefold axis from the starfish-shaped feature showing the enveloped nucleocapsid surrounded by a lower density space. The coloring is based on radial distance from the center of the virus. Gray = 0–1,800 Å; red = 1,800–2,100 Å; rainbow coloring from red to blue = 2,100–2,500 Å. Scale bars = 1,000 Å. Reproduced from [5].