Figure 2. Luminescence signal of the V. harveyi BB170 biosensor strain in the presence of sterile and neutralized supernatant of B. breve UCC2003, the insertion mutant B. breve UCC2003-luxS and the complemented strain B. breve UCC2003-luxS [pBC1.2luxS].

Data obtained with E. coli DH5α (a strain not producing AI-2) and a medium-only control are included as reference. Data shown are means ± SEM. (*, luminescence is significantly lower than than produced with supernatant of B. breve UCC2003, p<0.05, compared to WT; n = 3).