Hexokinase 2 also known as HK2 is an enzyme which in humans is encoded by the HK2 gene on chromosome 2.In particular, HK2 is ubiquitously expressed in tissues, though it is majorly found in muscle and adipose tissue. In cardiac and skeletal muscle, HK2 can be found bound to both the mitochondrial and sarcoplasmic membrane. The HK2 gene expression is regulated by a phosphatidylinositol 3-kinaselp70 S6 protein kinase-dependent pathway and can be induced by factors such as insulin, hypoxia, cold temperatures, and exercise. Its inducible expression indicates its adaptive role in metabolic responses to changes in the cellular environment.
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