In contrast, B6‐derived p50‐IMC (H‐2Kb) did not significantly slow the growth of MHC‐mismatched A/J‐derived Neuro2A Nb tumors (H‐2Kk) in A/J mice, further supporting a model in which p50‐IMC impair tumor growth predominantly via T‐cell activation (Fig. 5B). The gene discussed is NFKB1; the disease is neoplasm.