<p>(<b>A</b>) Schematic representation of recombinant adenovirus viral vectors encoding HBV S and PreS1 fusion genes. ITR, inverted terminal repeat. (B) Western blot detection of SS1 fusion protein expression in HEK293 cells infected with rAdSS1 using specific rabbit anti-PreS1 polyclonal antibodies. The bands of the expressed SS1 proteins are indicated by arrowheads.</p