FIG. 1.

Primary structure of HSV-1 gK. The amino acid sequence of gK is shown with its signal sequence (▨), glycosylation sites, and predicted transmembrane domains (▪). The gK sites where the V5 epitopes were inserted, as well as the location of the engineered syncytial mutation syn20 (Ala₄₀-to-Val₄₀), are indicated.