TSKU (Tafazzin Knockdown Factor Upstream): TSKU is a gene associated with tafazzin, an enzyme involved in the biosynthesis of cardiolipin, a phospholipid located in the inner mitochondrial membrane. Tafazzin plays a key role in mitochondrial function and energy production. The involvement of TSKU in regulating tafazzin suggests its importance in maintaining mitochondrial membrane integrity.