Objective To investigate the immune effect of AD2 site I(AD-2S1)of human cytomegalovirus(HCMV)glycoprotein B(g B) in mice. Methods AD-2 and 4 × AD-2S1 nucleic acid sequences were cloned into plasmid p ET42 bFlj B containing flagellin gene. The constructed recombinant plasmids p ET / Flj B-AD-2 and p ET / Flj B-4 × AD-2S1 were transformed to E. coli Rosetta 2(DE3)for expression under induction of IPTG. The lysate supernatant of E. coli containing Flj B-AD-2 and precipitate containing Flj B-4 × AD-2S1 were pu...