During infection with a mutant Salmonella Typhimurium strain where the GBS of SarA was replaced with the GBS from gp130 (psarA:gp130), the level of phosphorylation never reached the level seen with wild-type SarA and was more similar to the level seen with IL-6 stimulation (Figures 1H and 1I). This evidence concerns the gene IL6ST and infection.