SMOX and infection: Notably, there were more MPI-derived proteins following WTp0 or ΔLasBp0-PAO1 treatment (panel II, circles B and C), compared to un-infected cells (panel II, circle A), in agreement with a cellular “response to infection.” More specifically, more MPI-derived proteins were recovered following WT-p0 infection than with ΔLasBp0-PAO1 (panel II, circle B versus circle C), demonstrating a significantly “higher response” in the former.