Photosynthesis-And-Respirationrespiration-4

Step Number Krebs Cycle Step Substrate/Reactants Products Enzyme Energy Gained
Step 1 Acetyl-CoA Entry Acetyl-CoA + Oxaloacetate Citrate Citrate Synthase -
Step 2 Isomerization Citrate Isocitrate Aconitase -
Step 3 First Oxidation Isocitrate Alpha-Ketoglutarate + CO2 + NADH Isocitrate Dehydrogenase 1 NADH (per isocitrate)
Step 4 Second Oxidation Alpha-Ketoglutarate Succinyl-CoA + CO2 + NADH Alpha-Ketoglutarate Dehydrogenase 1 NADH (per alpha-ketoglutarate)
Step 5 Substrate-Level Phosphorylation Succinyl-CoA Succinate + GTP (or ATP) Succinyl-CoA Synthetase 1 GTP (or ATP)
Step 6 Oxidation and Electron Transfer Succinate Fumarate + FADH2 Succinate Dehydrogenase 1 FADH2 (per succinate)
Step 7 Hydration Fumarate Malate Fumarase -
Step 8 Final Oxidation Malate Oxaloacetate + NADH Malate Dehydrogenase 1 NADH (per malate)


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