Differential expression of peptides associated with stress response (UspA—Dsui_0474, Dsui_1634; ClpA—Dsui_0009; RraA family protein—Dsui_0010; LepA—Dsui_2457) (A), heavy-metal efflux pumps (Fe2+-regulated membrane proteins/Fe uptake regulators—Dsui_0002, Dsui_2733, Dsui_3068) (B), and motility under PSOX and heterotrophic culture conditions (FlgM—Dsui_1730; flagellar motor switch protein FliG—Dsui_1755; PilT—Dsui_0605; ATPase PilB—Dsui_1279; PilP—Dsui_1190) (C).