Flies were maintained as previously described (Yoo et al, 2016 (link)). The fly food is composed of the following ingredients: 0.8% agar, 10% glucose, 4.5% corn flour, 3.72% dry yeast, 0.4% propionic acid, 0.3% butyl p‐hydroxybenzoate. For acetate supplementation experiments, acetate (FUJIFILM Wako) was added to the fly food to a final concentration of 333 or 500 mM. Carnitine (Tokyo Chemical Industry) was also added to the fly food to a final concentration of 100 mM.
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