title: Electron microscopic observations on the purified dengue virus (Type I).
mesh_terms: D000818:Animals; D001921:Brain; D002499:Centrifugation, Density Gradient; D003716:Dengue Virus / Q000302:isolation & purification; D051379:Mice; D008854:Microscopy, Electron; D011479:Protamines
chemical_list: D011479:Protamines