ZEB2 (zinc finger E-box binding homeobox 2) is a transcriptional repressor that binds to DNA sequences and regulates multiple developmental and immune processes. The protein functions as a master regulator controlling cell fate transitions across different tissue types. In immune cells, ZEB2 drives the formation of age-associated B cells (ABCs) by binding to enhancer regions and repressing germinal center differentiation programs while promoting autoimmune-associated cell states 1. ZEB2 also controls the formation of CD4+ age-associated T helper cells that exhibit cytotoxic and B cell helper functions 2, and regulates tumor-associated macrophage programs by suppressing interferon responses and antigen presentation 3. In vascular biology, ZEB2 mediates smooth muscle cell phenotypic transitions through chr2 remodeling, affecting Notch and TGF-β signaling pathways and influencing atherosclerotic plaque characteristics 4. During brain development, ZEB2 promotes neuroepithelial cell shape transitions critical for human forebrain expansion 5. Clinically, ZEB2 haploinsufficiency causes Mowat-Wilson syndrome, a multisystem disorder characterized by intellectual disability, distinctive facial features, and various congenital malformations including Hirschsprung disease 6. The gene's diverse functions highlight its importance as a master transcriptional switch controlling cellular differentiation programs across multiple organ systems.