Figure 4
Latex beads assay. Micrographs of size-dependent internalization of fluorescently labeled polystyrene beads: 30 nm carboxylated-modified latex beads on IP15 cells (A) and LLC-PK1 cells (B), 500 nm sulphate-modified latex bead on IP15 cells (C) and LLC-PK1 cells (D) under epifluorescence microscope (Olympus BH2, magnification ×400).