title: The significance of the pre-S region of the hepatitis B virus.
mesh_terms: D006509:Hepatitis B / Q000235:genetics / Q000276:immunology; D006514:Hepatitis B Surface Antigens / Q000235:genetics* / Q000276:immunology; D006515:Hepatitis B virus / Q000235:genetics* / Q000276:immunology; D006801:Humans
chemical_list: D006514:Hepatitis B Surface Antigens