title: Pilus-specific, lipid-containing bacteriophages PR4 and PR772: comparison of physical characteristics of genomes.
abstract: The genomes of pilus-specific, lipid-containing phages PR4 and PR772 were studied electron microscopically. An identical mol. wt. of 10.9 x 10(6) was obtained. The genomes are unique (non-permuted) and have cohesive ends. From the similarities in size and denaturation maps of the genomes and failue to demonstrate non-homology in heteroduplexes, reported morphological ambiguities were clarified. The known serological difference between the phages could not be related to non-homology of their genomes. It is concluded that phages PR4 and PR772 are the same phage.
mesh_terms: D003090:Coliphages / Q000032:analysis / Q000235:genetics*; D004279:DNA, Viral / Q000032:analysis*; D010861:Fimbriae, Bacterial / Q000382:microbiology; D005814:Genes, Viral; D008055:Lipids / Q000032:analysis; D008970:Molecular Weight; D009690:Nucleic Acid Conformation; D009691:Nucleic Acid Denaturation; D009692:Nucleic Acid Heteroduplexes
chemical_list: D004279:DNA, Viral; D008055:Lipids; D009692:Nucleic Acid Heteroduplexes