What is the energy production from the complete oxidation of a single hypothetical 140-C FFA?

The complete oxidation of a 140-carbon fatty acid (FFA) involves β-oxidation followed by the citric acid cycle and oxidative phosphorylation. Each cycle of β-oxidation produces one molecule of acetyl-CoA, ultimately yielding a significant amount of ATP through the complete oxidation of these acetyl-CoA units. A rough estimate suggests that the total energy yield from the complete oxidation of a 140-carbon FFA can be around 900-1,000 ATP molecules, depending on the specific metabolic pathways and the efficiency of the electron transport chain.