Fig. 2. Representative cryo-transmission electron micrographs of the morphology of rhamnolipid in solution at (a) and (b) pH 4, (c) and (d) pH 5, (e) and (f) pH 6, and (g) and (h) pH 7. L, multilamellar vesicle; M, micelle; T, tubule; V, vesicle. Bar = 200 nm.