Analysis of the Ly6chi population in the liver at 7 dpi after infection with Pru-tdTom showed that a proportion of infected and uninfected cells express iNOS in the Rag1−/−mice, but iNOS levels were markedly reduced in the Rag1−/−; Il1rl1−/− mice (Figure 3F). The gene discussed is IL1RL1; the disease is infection.