Frontiers Research progress of glutathione peroxidase family (GPX) in redoxidation Glucose 6 phosphate dehydrogenase (G6PD): Response of the human erythrocyte and another cells to the decrease in their activity Although G6PD deficiency, which can cause problems in red blood cells upon certain triggers, is the most common human enzyme defect, affecting over 400 million people, including over 1 in 10 Black File:Pathology of G6PD deficiency.png Wikimedia Commons Glucose 6 phosphate dehydrogenase (G6PD) pathway. G6PD, Download Scientific Diagram