Oxidation of odd-chain fatty acids:

Fatty acids having an odd number of carbon atoms (that are associativaly rare in nature) are also degraded through the β-oxidation pathway in the similar way as those with an even number of carbon atoms.  The only difference is that in the last

Figure: Accessory enzymes required for the metabolism of unsaturated fatty acids.

round the five carbon acyl CoA in-between  is cleaved into one molecule of the C3 propionyl  CoA and one molecule of the C2 acetyl CoA. Then the propionyl CoA is converted into succinyl CoA that enters the citric acid cycle.