Figure 4: Control cultures represented by DRG primary cultures, in which neurons and glial cells were present. Phalloidin-staining labeled actin filaments in blue (c). Only neurons were positive for III tubulin (a and e, red) and Neun (b, green), and only glial cells were GFAP positive (f, green). Merges (d and g). Bars: 50 μm.