Specific Granule Deficiency 1, also known as specific granule deficiency, is related to recurrent infection due to specific granule deficiency and specific granule deficiency 2. An important gene associated with Specific Granule Deficiency 1 is CEBPE (CCAAT Enhancer Binding Protein Epsilon), and among its related pathways/superpathways is RNA Polymerase I Promoter Opening. Affiliated tissues include neutrophil and myeloid, and related phenotypes are recurrent bacterial infections and hyposegmentation of neutrophil nuclei