The PathHunter NIK Checkpoint Signaling cell line is a stable, engineered cell line for use in studying drug candidates (small molecules or biologics) targeting signaling checkpoints. This cell line enables assessment of ligand (e.g. CD40, TWEAK) induced non-canonical NF-κB signaling via detection of NIK stabilization. This product uses EFC technology. The included cell line overexpresses ED-tagged NIK (NF-kappa-B Inducing Kinase) protein. Upon activation of NFκB signaling by a ligand or an antibody, NIK is stabilized, allowing detection of EFC signal when treated with exogenous EA. This stable modified cell line is provided as two vials of cryopreserved cells.