Figure 4From: Acidic extracellular pH promotes epithelial mesenchymal transition in Lewis lung carcinoma modelMorphological changes of LLC variants in acidic medium. Cultures were pretreated overnight with serum-free DMEM/12 at pH 7.4 and incubated in serum-free medium at pH 6.8 or 7.4 for 24 h. Photographs were taken under an inverted phase contrast microscope. Representative results were shown from three or more independent experiments. Bar, 50 μm.Back to article page