MLXIP (MLX interacting protein, also called MondoA) is a glucose-responsive transcription factor that functions as a heterodimer with MLX to regulate nutrient metabolism 1. It binds E-box DNA sequences (5'-CACGTG-3') and activates transcription of glycolytic and lipogenic genes in response to glucose availability 1. MondoA couples intracellular glucose levels with carbohydrate and lipid metabolism by regulating glucose-responsive gene expression and controlling glucose uptake 2. The MondoA-TXNIP axis plays a critical metabolic regulatory role in immune cell function, particularly in regulatory T-cell identity and glucose utilization within tumor microenvironments 3. MondoA is more highly conserved across vertebrates than its paralog ChR12, suggesting it mediates more ancient glucose metabolic functions 4. Dysregulation of MLXIP expression is associated with multiple metabolic diseases: increased MLXIP expression in osteoarthritis tissues 5, and genetic variants in MLXIP show strong associations with type 2 diabetes risk and serve as eQTLs affecting glucose response pathways 6. Additionally, MLXIP variants were identified as predictive of disease progression in Crohn's disease 7. These findings establish MLXIP as a central regulator of glucose homeostasis with implications for metabolic and inflammatory diseases.