The genes IE175, IE63, IE68, IE12, UL29 and UL19 of herpes simplex vir
us types 1 and 2 were cloned. Fragments of these genes were cloned int
o open reading frame expression vector pEX1-3. Recombinant proteins co
ntaining amino acid sequences of ICP4, ICP27, ICP22, ICP47, major DNA-
binding protein and major capsid protein were expressed in E. coli cel
ls by fusion with cro-beta-galactosidase proteins.