Figure 4.

Alkyl quinolone gene expression of pqsH is reduced in planktonic co-culture with E. faecalis or with exogenous ornithine. A. Fluorescence expression of P_pqsH-sfgfp is reduced in planktonic co-culture with E. faecalis in comparison to P. aeruginosa monoculture or with E. coli (where P_pqsH-sfgfp expression is elevated). (B) Fluorescence expression of P_pqsH-sfgfp is reduced in planktonic co-culture with increasing amounts of L-ornithine. Values represent averages of ≥3 wells each for which reporter fluorescence was normalized to culture density.