title: Purification and serological reactions of four polyhedral viruses from Cruciferae.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient; D007106:Immune Sera; D005779:Immunodiffusion; D008854:Microscopy, Electron; D010935:Plant Diseases; D010942:Plant Viruses / Q000145:classification / Q000276:immunology / Q000302:isolation & purification; D010945:Plants, Edible; D011233:Precipitin Tests; D011817:Rabbits; D013053:Spectrophotometry; D013395:Sucrose; D014466:Ultraviolet Rays
chemical_list: D007106:Immune Sera; D013395:Sucrose