Abstract
2,4-Dienoyl-CoA reductase has been separated from Escherichia coli grown in the presence of linoleic acid and purified to homogeneity. The enzyme has a molecular weight close to 50,000 as determined by gel filtration on Sephacryl S-200 Super-fine. The reductase was rather stable in a buffer containing citric acid and kept its full activity on heating at 55 degrees C for 10 min in the pH range of 5.5 to 6.5, but was completely inactivated on heating at 58 degrees C for 10 min. Phosphocellulose column chromatography revealed that the reductase was not involved in the multi-enzyme complex (molecular weight of 260,000) of fatty acid oxidation.
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