Figure 1.
Schematic map of herpes simplex virus (HSV) genome illustrating the position of genes (IE, E, L) deleted or mutated in oHSVs. The genome consists of unique long (L) and short (S) sequences bracketed by terminal (TR) and internal (IR) inverted repeat sequences and separated by the joint region. The number of a sequence repeats is variable. Arrows indicate direction of transcription.