| the role of temperate bacteriophage sp beta in prophage-mediated interference in bacillus subtilis. | virulent bacteriophage phi 1 grows on a variety of bacillus subtilis strains, mutants of this virus which abortively infect the transformable bacillus. b. subtilis 168, while retaining the ability to productively infect related bacteria have been found. in the present study, we demonstrate that the inability of one such variant, phi 1m, to develop normally in strain 168 is mediated by cryptic prophage sp beta. the latter is a temperate bacteriophage which is carried by b. subtilis 168 and most s ... | 1979 | 119575 |