title: Considerations on several methods for the purification of viral hepatitis antigen (HB Ag).
mesh_terms: D002499:Centrifugation, Density Gradient; D002845:Chromatography; D002850:Chromatography, Gel; D005455:Fluorescent Antibody Technique; D006506:Hepatitis A / Q000382:microbiology; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D007122:Immunoelectrophoresis; D066298:In Vitro Techniques; D008722:Methods; D008854:Microscopy, Electron
chemical_list: D006511:Hepatitis B Antigens