11. IMP dehydrogenase 1 acts as a homotetramer to regulate cell growth. 12. Betaine aldehyde is a substrate for choline dehydrogenase ( mitochondrial ). 13. Muscle enzymes are increased, commonly lactate dehydrogenase ( LDH ). 14. MTHFD2L is a member of the tetrahydrofolate dehydrogenase / cyclohydrolase family. 15. Calcium also activates isocitrate dehydrogenase and & alpha;-ketoglutarate dehydrogenase. 16. Calcium also activates isocitrate dehydrogenase and & alpha;-ketoglutarate dehydrogenase . 17. Anthony and Zatman also found the unknown redox cofactor in alcohol dehydrogenase . 18. Patients with glucose-6-phosphate dehydrogenase risk haemolysis. 19. The formation of the sorbitol dehydrogenase tetramer from its monomers via dimers. 20. For example, oxaloacetate is formed by malate dehydrogenase within the mitochondrion.