Summary: Whole cells of the fungus Zygorrhynchus moelleri can oxidize acetate, cis-aconitate, citrate, fumarate, glucose, malate, α-ketoglutarate, pyruvate, and succinate under appropriate conditions. The rates of oxidation of acetate and succinate, in particular, are very high and exceed the rate of glucose oxidation. Diethylmalonate in high concentration inhibits the oxidation of glucose and acetate, but succinate oxidation is not greatly inhibited by malonic acid, even when the malonate concentration is twice the succinate concentration.