FIG 7.

Electron micrographs of human DRG axons infected with US9 deletion (US9⁻ and F-US9/GFP), US9 repair (US9R and F-US9/GFP-R), KOS, and F strain viruses. Coverslips with explanted human fetal DRG in situ were HSV-1 infected, fixed at 24 hpi, and processed for TEM. Areas containing mid- and distal regions of axons were sectioned and examined using either a Phillips CM120 BioTWIN at 100 kV or an FEI Tecnai G2 20 TWIN at 120 kV. Unenveloped capsids (arrowheads) in mid- to distal axons were observed in all infected axons. Bars, 200 nm.