“…A major target of the immune response to CMV infection is glycoprotein B (gB), a constituent of the virion envelope and a homologue of herpes simplex virus 1 gB (Chee et al, 1990). The CMV gB gene has been mapped in the genomes of strain AD169 (Cranage et al, 1986;Mach et al, 1986) and Towne Spaete et al, 1988). This glycoprotein is produced as a full-length precursor, which is glycosylated (Britt & Auger, 1986;Pereira et al, 1984;Rasmussen et aL, 1985bRasmussen et aL, , 1988 and proteolytically cleaved between residues 460 and 461 after its synthesis (Spaete et al, 1988(Spaete et al, , 1990.…”