AK9 (Adenylate Kinase 9): Adenylate is a gene that encodes an enzyme from the adenylate kinase family, which catalyzes the reversible transfer of phosphate groups between adenine nucleotides, mainly ATP and AMP. AK9 localizes to the mitochondria, where it supports energy metabolism and nucleotide balance. By facilitating ATP-AMP interconversion, it helps regulate cellular energy levels and contributes to processes such as mitochondrial function, apoptosis, and stress responses. Dysregulation of AK9 may impact metabolic and cellular homeostasis.