RT Journal Article SR Electronic(1) A1 Coetzee, W. F. A1 Bekker, P. J.YR 1979 T1 Pilus-specific, Lipid-containing Bacteriophages PR4 and PR772: Comparison of Physical Characteristics of Genomes JF Journal of General Virology, VO 45 IS 1 SP 195 OP 200 DO https://doi.org/10.1099/0022-1317-45-1-195 PB Microbiology Society, SN 1465-2099, AB SUMMARY The genomes of pilus-specific, lipid-containing phages PR4 and PR772 were studied electron microscopically. An identical mol. wt. of 10.9 × 106 was obtained. The genomes are unique (non-permuted) and have cohesive ends. From the similarities in size and denaturation maps of the genomes and failure 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., UL https://www.microbiologyresearch.org/content/journal/jgv/10.1099/0022-1317-45-1-195