title: Three nucleoprotein components of alfalfa mosaic virus necessary for infectivity.
mesh_terms: D002499:Centrifugation, Density Gradient; D004492:Edetic Acid; D008433:Mathematics; D009698:Nucleoproteins / Q000032:analysis / Q000302:isolation & purification / Q000378:metabolism*; D010942:Plant Viruses / Q000032:analysis / Q000378:metabolism / Q000472:pathogenicity*; D014461:Ultracentrifugation
chemical_list: D009698:Nucleoproteins; D004492:Edetic Acid