We tested this hypothesis by co-infecting pancreas with two viruses carrying Nr5a2 and Ngn3. 10 days after the infection, analyses revealed that persistent expression of Nr5a2 strongly blocked induction of Pax6 and Sst (Figure 6B,E,G), compared with Ngn3 alone controls (Figure 6A,D,G). The gene discussed is NEUROG3; the disease is infection.