Characterization of spontaneous mutant phages.

<p><b>A</b>: Adsorption assay of bacteriophages JG004-m0 and JG004 to <i>P. aeruginosa</i> PA1 and PAO1. <b>B</b>: Gene organization of the region encoding tail proteins in JG004. The star in ORF84 indicates an A1959C mutation in ORF84 (2058 bp) in mutant phage JG004-m0. The alignment of the DNA and amino acid sequences of ORF84 between phage JG004 and five mutant phages indicates that the adenine (A) residue in phage JG004 changed to cytosine (C) in the mutant phages (shown in red).