Immunodeficiency 73c with Defective Neutrophil Chemotaxis and Hypogammaglobulinemia, is also known as imd73c. An important gene associated with Immunodeficiency 73c with Defective Neutrophil Chemotaxis and Hypogammaglobulinemia is RAC2 (Rac Family Small GTPase 2). Affiliated tissues include neutrophil and b cells, and related phenotypes are recurrent respiratory infections and decreased circulating igg level