<i>aex-5</i> mutants take up a fluorescently labelled fatty acid derivative from the intestinal lumen less efficiently than wild type.

<p>A. Confocal fluorescence micrographs of worms fed the fluorescently labelled fatty acid derivative C₁-BODIPY 500/510 C₁₂. The panels at the top show parts of the intestines of adult worms; those at the bottom show first larval stage (L1) worms. The arrows point to the intestinal lumen where most of the dye is found in the mutants. Scale bars are 20 μ m. B. Graphs showing quantification (in arbitrary units) of the uptake of the dye into the cytoplasm of intestinal cells (Materials and Methods). Error bars indicate standard errors of the means. **** indicates significant difference in the means determined by one-way ANOVA and Dunnett's multiple comparisons test (σ = 0.05).