Whole-phage-genome comparison using Southern blot hybridization. Purified phage DNA from different temperate phages in our collection was compared using DIG-labeled whole-phage genomes as probes. Phages ϕCD38-2, ϕCD24-1, ϕCD111, and ϕCD29 are Siphoviridae phages, whereas all the others are Myoviridae phages. Lane M, DIG-labeled lambda HindIII DNA marker (NEB).