GJA1 and infection: The gap junction marker, Connexin 43, was also downregulated after Neurog2 overexpression (Figure 3B; quantitation of the Connexin 43 intensity in Figure 3C: GFP control, 19.4 ± 0.7 a.u.; Neurog2, 11.6 ± 0.8 a.u.; at 20 days after infection), which was consistent with neurons having less gap junctions compared with glial cells41.