Fig. 2.

Ultrastructural characterization of baculovirus envelope proteins. (A and B) Cryo-EM images of envelope proteins on AcMNPV (A) and SeMNPV (B) BVs. The squared regions on the viral envelope were further focused in the lower panels showing more detailed structural patterns. Scale bars represent 50 nm. (C) Comparative analysis of length distributions on envelope fusion proteins from AcMNPV (n = 79; mean = 15 nm, SD = 2.1 nm) and SeMNPV (n = 30; mean = 14 nm, SD = 3.8 nm) BVs. (D) Thickness distributions of viral envelopes from AcMNPV (n = 62; mean = 7 nm, SD = 0.7 nm) and SeMNPV (n = 30; mean = 6 nm, SD = 0.4 nm). Spikes were excluded from membrane measurement.