PAX2 (Paired Box Gene 2): PAX2 is a crucial transcription factor in the paired box gene family that plays an essential role in the development of kidneys and the urinary tract. It acts early during embryonic stages to regulate tissue and organ formation, directing the development of the renal system, eyes, ears, and central nervous system. By controlling cell proliferation, differentiation, and apoptosis, PAX2 contributes to the formation of vital structures within these systems. Abnormalities in PAX2 expression or function are linked to congenital anomalies of the kidney and urinary tract (CAKUT), as well as other developmental disorders.