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Updated: Jul 29, 2026

Lipid Index Determination by Liquid Fluorescence Recovery in the Fungal Pathogen Ustilago Maydis
Published on: April 3, 2018
Endogenous lipids of the earthworm Lumbricus terrestris
P W Albro1, J T Corbett, J L Schroeder
1Laboratory of Molecular Biophysics, National Institute of Environmental Health Sciences, Research Triangle Park, N.C. 27709.
Abstract:
Earthworms (Lumbricus terrestris) were given [1-14C]-labeled palmitic acid by gavage on days 0 and 3, and sacrificed on day 7. The distribution of label among lipid classes indicated that glycerides, sterol esters, cerebrosides, sulfatides, phosphatidylethanolamine, phosphatidylserine and (or) phosphatidylinositol, phosphatidylcholine, and sphingomyelin turn over in, or are synthesized by, the earthworm. Free fatty acids still had the highest specific radioactivity of any lipid class at the end of the experiment. Incorporation of label into sterol and hydrocarbon fractions was insignificant and there was no detectable label incorporated into gangliosides. Phosphatidylethanolamine apparently turned over quite slowly compared with other lipid classes, while the cerebroside fraction became highly labeled. Elongation of palmitic acid to stearate and oxidation to CO2 occurred extensively, but there was no evidence for desaturation.
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