title: The pre-S2 region of hepatitis B virus: more questions than answers.
authors.forename: M A
authors.initials: MA
authors.lastname: Gerber
authors.forename: S N
authors.initials: SN
authors.lastname: Thung
mesh_terms: D005814:Genes, Viral; D006509:Hepatitis B / Q000276:immunology; D006514:Hepatitis B Surface Antigens / Q000235:genetics; D006515:Hepatitis B virus / Q000235:genetics; D006801:Humans; D011498:Protein Precursors / Q000235:genetics; D014759:Viral Envelope Proteins
chemical_list: D006514:Hepatitis B Surface Antigens; D011498:Protein Precursors; D014759:Viral Envelope Proteins; C050807:presurface protein 2, hepatitis B surface antigen