Beacle has been a leader in devloping original hepatitis B virus-related products for over 10 years and offers the world's first kit for determining HBV Pre-S1 antigenThe Pre-S1 region of surface antigen of HBV is known to play an important role in the recognition of human hepatocyte and resulting infection. The Pre-S1 mouse antibody is ideal for both western blot and ELISA assays.