– Trans-10-heptadecenoic acid, a trans-fatty acid, undergoes polymerization to form polyhydroxy-chain alkanoates via the enzymatic actions of 2,4-dienyl-CoA reductase and Delta3, Delta2-enyl-CoA isomerase. In the enzyme’s absence, degradation is facilitated by enyl-CoA hydratase II from the multifunctional enzyme (MFE), causing significant intracellular carbon release through both reductase-dependent and direct MFE-dependent pathways [1].