Restriction fragment maps of the genome of Bacillus subtilis bacteriophage SP beta

Six different restriction endonucleases were used to generate restriction fragment maps of the genome of the temperate Bacillus subtilis phage SP beta. AvaI and SalI each had six target sites in the phage DNA, AvaII had three, BamHI had seven, PstI had twenty, and SacI had sixteen. Restriction analysis and heteroduplex analysis were used to locate a 10-kb region of DNA that is deleted in the clear-plaque mutant, SP beta cl. The deletion lay approx. 50 kb from the left end of the 126-kb phage genome.