NFKB1 and infection: To determine the role of the NF-κB signaling pathway in the replication of TGEV, the NF-κB-specific inhibitor Bay 11–7082 and QNZ were used to inhibit NF-κB activation in ST cells infected with TGEV, respectively; viral titers were titrated by 50% tissue culture infectious dose (TCID50) assays at different time-points post-infection.