A putative multicopper oxidase, IoxA, is involved in iodide oxidation by Roseovarius sp. strain A-2.

Roseovarius sp. strain A-2 is an aerobic heterotrophic bacterium with a capacity for oxidizing iodide ion (I(-)) to form molecular iodine (I2). In this study, iodide-oxidizing enzyme of strain A-2 was characterized.