title: DNA arrangement in isometric phage heads.
abstract: DNA is wound tightly into phage heads in such a way that it tends to form layers concentric with the rigid protein shell. In P22 and wild-type lambda, DNA completely fills the internal volume, with a highly uniform local packing of adjacent segments; in lambda deletion mutants containing less than a full genome, the local packing distance increases correspondingly.
mesh_terms: D002872:Chromosome Deletion; D003090:Coliphages / Q000648:ultrastructure*; D004279:DNA, Viral; D009154:Mutation; D009690:Nucleic Acid Conformation; D012483:Salmonella Phages / Q000648:ultrastructure*; D013816:Thermodynamics; D014961:X-Ray Diffraction
chemical_list: D004279:DNA, Viral