Starting from the Oxaloacetate (OAA) (C4) combined with Acetyl coA (C2) is acid
, citric acid (C6) from the citric acid will change
over. Decarboxylation as C5 instead
(Alpha-ketoglutarate) before the
Decarboxylation again until the C4 has
a number Oxaloacetate back again.