FIG. 5.

Stereo pairs presenting the outer surfaces of the moderately tegumented cytoplasmic B-capsid (a) and the heavily tegumented cytoplasmic B-capsid (b) of SCMV. Also shown are difference maps of the moderately tegumented cytoplasmic B-capsid minus the nuclear B-capsid (c) and the heavily tegumented cytoplasmic B-capsid minus the moderately tegumented cytoplasmic B-capsid (d). Because we wished to focus on components associated with the outer surface of the capsid, the internal density was set to zero in both maps to avoid distracting differences from the relatively noisy internal regions. Map c reveals the capsomer-capping tegument protein, and map d reveals the triplex-associated tegument protein. Bar (a), 10 nm.