<prompt> Substrate-level phosphorylation seen in reaction catalysed inSuccinate dehydrogenaseAlfa-ketoglutarate dehydrogenaseSuccinyl CoA thiokinaseMalate dehydrogenase  <response>: 5th Step of TAC CYCLE: Generation of Succinate The next reaction involves a substrate level phosphorylation whereby a high energy phosphate is generated from the energy trapped in the thioester bond of succinyl CoA. The enzyme is succinate thiokinase step 5, Fig.18.2. A molecule of GDP is phosphorylated to GTP and succinate is formed. The GTP can be conveed to ATP by reacting with an ADP molecule: GTP ADP - GDP ATPRef: DM Vasudevan Textbook of Medical Biochemistry, 6th edition, page no: 218 