LDHA and neoplasm: As the ability to withstand cytotoxic treatments is a known feature of stem cells, and in light of recent reports associating the occurrence of EMT with tumor stemness, we analyzed the A549 and HCC827 cell pairs for the presence of cells with high levels of aldehyde dehydrogenase (ALDH) activity, which has been previously reported to be increased in cells with precursor features (i.e., stem cells and stem-like cells).