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Cold exposure promotes lipid hydrolysis. (a) A representative image of lipid droplets using Oil Red O staining. The quantity of lipid droplets in wild type worms (WT) was significantly reduced after cold exposure at 1, 3, and 7 days. However, the mutation in kin-1(ok338) inhibited cold-induced lipid hydrolysis. *P < 0.05; **P < 0.01. Scale bar, 150 μm. (b) The relative triacylglycerol contents were determined by GC-MS. *P < 0.05; **P < 0.01.
