title: Separation of ECHO virus type 6 antigens by centrifugation in caesium chloride density gradients. II. Electron microscopy.
mesh_terms: D000941:Antigens / Q000302:isolation & purification*; D002499:Centrifugation, Density Gradient; D002586:Cesium; D002712:Chlorides; D029822:Enterovirus B, Human / Q000276:immunology*; D006367:HeLa Cells; D006358:Hot Temperature; D006801:Humans; D008854:Microscopy, Electron; D012822:Silicon Dioxide; D013194:Staining and Labeling; D014414:Tungsten; D014764:Viral Proteins / Q000302:isolation & purification*; D014776:Virus Cultivation
chemical_list: D000941:Antigens; D002712:Chlorides; D014764:Viral Proteins; D002586:Cesium; D012822:Silicon Dioxide; D014414:Tungsten