The OTUD7B protein acts as a negative regulator to inhibit the non-canonical NF-kappa-B pathway by deubiquitinating TRAF3, thereby inhibiting B cell responses. It prevents degradation of “Lys-48”-linked polyubiquitin chains on TRAF3 during atypical NF-kappa-B stimulation, avoiding overactivation of the pathway and affecting mucosal immunity. OTUD7B Protein, Human (sf9, His, Strep) is the recombinant human-derived OTUD7B protein, expressed by sf9 insect cells , with N-Strep, N-8*His labeled tag.