title: Isolation of high-density mutants and identification of nonessential structural proteins in bacteriophage T5; dispensability of L-shaped tail fibers and a secondary major head protein.
mesh_terms: D002500:Centrifugation, Isopycnic; D003090:Coliphages / Q000302:isolation & purification* / Q000502:physiology / Q000648:ultrastructure; D004279:DNA, Viral / Q000032:analysis; D005814:Genes, Viral; D009154:Mutation; D014764:Viral Proteins / Q000096:biosynthesis / Q000502:physiology*
chemical_list: D004279:DNA, Viral; D014764:Viral Proteins