IL12RB2 and infection: Weight changes in the 2 genotypes were also similar during the course of infection (Fig. 3C), and neither Il12rb2−/− mice nor their Il12rb2+/+ littermate controls succumbed to death following C. rodentium infection (Fig. 3D), indicating the dispensable function of IL-12Rβ2 signaling in host immunity during colonic infection.