Fatty Acid Ethyl Esters of Rhizopus arrhizus

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Science  21 May 1971:
Vol. 172, Issue 3985, pp. 864-865
DOI: 10.1126/science.172.3985.864


Gas chromatographic and mass spectrometric analyses on selected lipid fractions revealed for the first time the presence of ethyl esters of long-chain fatty acids as biological products. Ethyl esters of oleic, palmitic, and stearic acids were detected in relative concentrations of 21.2, 2.4, and 1.5 percent, respectively, of the total methyl and ethyl ester fraction. Both saturated and unsaturated ethyl esters contain pronounced mass spectral fragments at a mass-to-charge ratio of 88.