Fig. 4

Time course of the P. putida pJG-cco1::gfp biosensor activity during different oxygen availability profiles. Growth (CDW, black triangles) and specific fluorescence (RFU/OD, green dots) of P. putida pJG-cco1::gfp, oxygen levels (pO2, blue line). Top panel: Stepwise decrease from 40–0%. Mid panel: Constant pO2 of 40%. Bottom panel: Drop of pO2 from 40–0%