Confirmation of the differentially expressed proteins of annexin A2 and beta-actin by Western blot . The equal cell lysates of control and DHBV infected PDHs at 12, 24, 72 and 120 h post-infection were separated by SDS-PAGE, and detected by Western blotting with mouse anti-beta-actin and anti-duck annexin A2 as primary antibodies and then followed by horseradish peroxidase-conjugated goat anti-mouse IgG as secondary antibody (A). The same amount protein of each sample were applied to a parallel SDS-PAGE gel and stained with Coomassie brilliant blue (B).