Restriction endonuclease and genetic mapping studies indicate that the vegetative genome of the temperate, Salmonella-specific bacteriophage, epsilon 15, is circularly-permuted.

Data from physical and genetic mapping studies show that the vegetative genome of the temperate, Group E 1 Salmonella bacteriophage, epsilon 15, is circularly-permuted. Preliminary evidence suggests that the circular permutation of the epsilon 15 genome is non-random.