Severe Combined Immunodeficiency Due to Ikk2 Deficiency, also known as scid due to ikk2 deficiency, is related to immunodeficiency 15b. An important gene associated with Severe Combined Immunodeficiency Due to Ikk2 Deficiency is IKBKB (Inhibitor Of Nuclear Factor Kappa B Kinase Subunit Beta). Affiliated tissues include b cells and liver.