UCP2 and cancer: Although UCP2 mRNA is ubiquitously distributed among different cell types, detectable amounts of UCP2 at the protein level seem to be present only in fast proliferating cells which are metabolically supported by aerobic glycolysis such as activated lymphocytes, macrophages, hematopoietic stem cells and cancer cells [12], [15], [19], [20], [22], [33].