Join UMDF as we mark TK2d Tuesday. Thymidine kinase 2 deficiency (TK2d) is a rare genetic mitochondrial disease caused by inherited mutations in TK2, a nuclear gene responsible for making a mitochondrial enzyme called thymidine kinase 2. These mutations reduce the amount and quality of mitochondrial DNAs inside cells.

Learn more about TK2d at umdf.org/tk2d.

TK2d is supported by UCB.