Association of tegument proteins with cytoplasmic nucleocapsids (left panels) and released capsidless particles (right panels) of PrV-ΔUL48. Infected RK13 cells (see Fig. 8) were embedded for immunoelectron microscopy, and ultrathin sections were incubated with monospecific rabbit sera against the UL36, UL37, UL46, UL47, UL48, and UL49 gene products and 10-nm gold-tagged secondary anti-rabbit antibodies. Bars, 200 nm.