title: Separation and purification of hepatitis-associated antigen into morphologic types by zonal ultracentrifugation.
mesh_terms: D002501:Centrifugation, Zonal; D002586:Cesium; D002712:Chlorides; D006509:Hepatitis B / Q000097:blood; D006511:Hepatitis B Antigens / Q000145:classification / Q000302:isolation & purification; D006515:Hepatitis B virus / Q000302:isolation & purification*; D006801:Humans; D005779:Immunodiffusion; D008722:Methods; D008854:Microscopy, Electron; D011110:Polymorphism, Genetic; D013194:Staining and Labeling; D014461:Ultracentrifugation
chemical_list: D002712:Chlorides; D006511:Hepatitis B Antigens; D002586:Cesium