CHUK and infection: Lastly, The Ser/Thr kinase COT, CHUK (Iκκ-A), NF-κB1A (IκB), and NF-κB (p105 and p100), all significantly phosphorylated within 4-8 h of infection with S. Enteritidis (Table 9), but all were found to be no different than non-infected control levels by 24 h (Table 4).