TSKU (Tafazzin Knockdown Factor Upstream): TSKU is a gene linked to tafazzin, an enzyme involved in the biosynthesis of cardiolipin, a phospholipid found in the inner mitochondrial membrane. Tafazzin plays a crucial role in mitochondrial function and energy production. The role of TSKU in regulating tafazzin highlights its significance in maintaining the integrity of the mitochondrial membrane.