title: Heterogeneous buoyant density in batches of viral nucleopolyhedra.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient; D007181:Inclusion Bodies, Viral; D007304:Insect Viruses / Q000302:isolation & purification*; D007313:Insecta; D007814:Larva; D014020:Tissue Extracts / Q000032:analysis
chemical_list: D014020:Tissue Extracts