Figure 7: Cellular uptake of FITC-HA and FITC-Cyt c-HA 1MDa by various cell lines. A) Confocal images of cancer (HeLa and A549 cells) and normal (NIH-3T3) cell lines visualized after 30 min, 2 h, and 6 h of incubation. Left panel=HA, Right panel=Cyt c-HA 1MDa. Bar scale=20 μm. B) Quantitative FITC intensities from A. Cells from each image were randomly selected to calculate mean values ± SD. Asterisks (**p<0.001) represent statistically significant difference between CD44-positive cells to control CD44-negative cells (NIH3T3).