title: Studies on hepatitis B virus antigens. I. Separation of hepatitis B surface antigen (HBsAg) from human plasma and heterogeneity of the polypeptides in the antigen.
mesh_terms: D002499:Centrifugation, Density Gradient; D004591:Electrophoresis, Polyacrylamide Gel; D000939:Epitopes / Q000302:isolation & purification; D006023:Glycoproteins / Q000302:isolation & purification; D006514:Hepatitis B Surface Antigens / Q000235:genetics / Q000302:isolation & purification*; D006801:Humans; D008970:Molecular Weight; D010455:Peptides / Q000302:isolation & purification
chemical_list: D000939:Epitopes; D006023:Glycoproteins; D006514:Hepatitis B Surface Antigens; D010455:Peptides