Immunodeficiency 29, also known as mendelian susceptibility to mycobacterial diseases due to complete il12b deficiency, is related to autosomal recessive mendelian susceptibility to mycobacterial diseases due to a complete deficiency and immunodeficiency 30. An important gene associated with Immunodeficiency 29 is IL12B (Interleukin 12B), and among its related pathways/superpathways are Immune response Antigen presentation by MHC class II and IL12-mediated signaling events. Affiliated tissues include lung, and related phenotypes are bcgitis and immunodeficiency