An insertion mutation was constructed in the rpoS gene on the chromosome of L . pneumophila , and the ability of this mutant strain to survive various stress conditions was assayed and compared with results for the wild-type strain .
an insertion mutation was constructed in the rpos gene on the chromosome of l . pneumophila , and the ability of this mutant strain to survive various stress conditions was assayed and compared with results for the wild-type strain .
O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O B-mono_cell I-mono_cell I-mono_cell O O O O O O O O O O O O O O O O O O O O O B-mono_cell I-mono_cell O