Used in biological research to measure the activation levels of nuclear factor kappa B (NF-κB) in duck cells or tissues. This kit enables scientists to quantify NF-κB, a key transcription factor involved in immune responses, inflammation, and cellular stress pathways. It is commonly applied in veterinary immunology, virology, and vaccine development studies where understanding the duck immune system is critical. Researchers use it to evaluate the impact of pathogens, drugs, or immunomodulators on NF-κB signaling in avian models. The assay helps in studying host-pathogen interactions, especially in diseases like duck plague or avian influenza.