Hepatitis B Surface Antigen (HBsAg-Ad) >90%

Source from the Antibodies.com antigen range, this purified viral protein is supplied as a 1 mL liquid preparation of Hepatitis B Surface Antigen, subtype ad (HBsAg-Ad), with a purity rating above90% as verified by ELISA, and is intended for use as a coating antigen and standard in ELISA-based hepatitis B virus immunoassays. The product is formulated in phosphate buffer with saline and is offered unconjugated, making it suitable as both an immunogen for antibody screening and a reference calibrator in diagnostic workflows that detect HBsAg in human serum or plasma. Because HBsAg is the principal envelope glycoprotein of HBV and the earliest serological marker of infection, this antigen supports a range of research and development activities, including vaccine formulation studies, assay validation, and the characterization of anti-HBs antibodies. Each lot is quality-controlled to the same specifications used across the Antibodies.com Hepatitis B reagent portfolio, with reactivity directed against the ad subtype of the surface antigen. For short-term handling the liquid should be kept refrigerated, and for longer storage it should be aliquoted and frozen to preserve the >90% purity over multiple working cycles. This reagent is supplied for research use only and is not approved for diagnostic or therapeutic applications.