Acetyl group released from acetyl coenzyme A combines with a 4 carbon compound, oxaloacetate, to form a 6 carbon compound , citrate
krebs cycle step 2
citrate decarboxylated and dehydrogenated, producing a 5C compound, one molecule of carbon dioxide and one molecule of reduced NAD
krebs cycle step 3
This 5C is further decarboxylated and dehydrogenated, producing a 4C compound, one molecule of carbon dioxide and one molecule of reduced NAD
krebs cycle steps 4
This 4C compound combines temporarily with, and is then released from, Coenzyme A. At this stage, substrate-level phosphorylation takes place, producing one molecule ATP.
krebs cycle steps5
the 4C compound is dehydrogenated, producing a different 4C compound and a molecule of reduced FAD.
krebs cycle step 6
rearrangement of atoms in the 4C molecule, catalysed by an isomerase enzyme, followed by further dehydrogenation, regenerate a molecule of oxaloacetate, so the cycle can continue
