Figure 6. Cx43 and GFAP immunostaining. Glial fibrillar acidic protein (GFAP)-positive astrocytes at the roof of the foveal pit from P1 (A, B, and inset), P4 (C, D, and inset), and P7 (E, F, and inset) express connexin 43 (Cx43). Cx43 is also faintly expressed in retinal Müller glial (RMG) cells in Henle’s fiber layer.