Analysis of host cell killing upon infection with mutants ligts of bacteriophage Mu.

Infection of Escherichia coli with the mutant ligts2 of bacteriophage Mu at a temperature non-permissive for this mutant is lethal for the host cell. This effect is insensitive to phage immunity and is not suppressed in trnas in bacterial strains producinf the Lig+ active protein. These data suggest that the killing effect of this mutant is different is different from the other kil functions identified in Mu