Frontiers The Role of the Pentose Phosphate Pathway in Diabetes and Cancer Mitochondria: Origin from oxygen free environment, role in aerobic glycolysis, metabolic adaptation Leaders in Pharmaceutical Business Intelligence Group, LLC, Doing Business As LPBI Group, Newton, MA Mitochondrial transhydrogenase a key enzyme in insulin secretion and, potentially, diabetes: Trends in Biochemical Sciences RETRACTED: Nicotinamide nucleotide transhydrogenase: A key role in insulin secretion Mitochondrial transhydrogenase a key enzyme in insulin secretion and, potentially, diabetes: Trends in Biochemical Sciences