IglA is required for intracellular growth. Growth of ΔiglA strain in J774 mouse macrophage-like cells. Filled squares, parental strain JLO; open squares, ΔiglA; triangles, in cis complementation strain; diamonds, iglC transposon insertion mutant CG62. The experiments were done in triplicate and standard errors are shown by bars. This graph shows data from one of three independent experiments.