Quorum Sensing and Spoilage Potential of Psychrotrophic Enterobacteriaceae Isolated from Milk

Figure 8

High-performance liquid chromatography-positive electrospray ionization (ESI⁺-) MS chromatogram showing the mass spectra for the signal molecules present in cell-free supernatant of E. coli XL1-Blue pQE-30Xa-halI. Signal molecule extract was obtained from overnight cell-free culture supernatant in LB minimal medium.