NF-kappaB2

Gastric hyperplasia
Increased proliferative responses of lymphocytes
Enlarged lymph nodes
Increased lymphocyte proliferation in response to several stimuli
Enhanced cytokine production in activated T cells
Early postnatal death

Reference:

Ishikawa H, Carrasco D, Claudio E, Ryseck RP, Bravo R.: Gastric hyperplasia and increased proliferative responses f lyphocytes in mice lacking the COOH-terminal ankyrin. J Exp Med 1997 Oct 6;186 (7):999-1014.