Objective To investigate the function of hepatitis B virus polymerase(HBV Pol) in the viral life cycle by screening the proteins interacting with HBV polymerase.Methods The HBV Pol gene was constructed into the pGBKT7 vector.GAL4 yeast two-hybrid system was used to screen the human liver cDNA library to obtain proteins which interacted with HBV Pol.GST-pull down assay was applied to confirm the protein interactions.Results Ubiquitously expressed transcript(UXT) was selected by the yeast two-hybrid system.GS...