3.6. QQ activity in various fractions obtained with SEC
The remaining AHL levels in the different fractions of supernatant
treated with size exclusion chromatography are shown in Fig. 5. For
Delftia sp. Le1-2 the QQ activity is only present in the fraction
containing molecules larger than 6000 Da, indicating that the QQ
activity in this isolate is most likely due to enzymatic degradation of
the signal molecules