title: Isolation of a series of Mengo virus variants differing in sensitivity to polyanions.
mesh_terms: D000362:Agar; D000818:Animals; D004686:Encephalomyocarditis virus / Q000302:isolation & purification*; D051379:Mice; D011479:Protamines / Q000494:pharmacology*; D013431:Sulfates / Q000494:pharmacology*; D014774:Virulence / Q000187:drug effects*
chemical_list: D011479:Protamines; D013431:Sulfates; D000362:Agar