Fig. 3

UPLC–MS profiles of rhamnolipid standard (a); ST5 Fructose-MSM extract (b); ST5 Glucose-MSM extract (c). The top row profiles show the signal of positive molecular ions detected between 6 and 11 min. Note the difference in Y axis which is a direct indication of amounts. The profiles below each top row spectrum show the extracted spectra of the rhamnolipid group