. "Protein involved in the degradation of acetoin (3-hydroxy-2-butanone). Acetoin is a component of the butanediol cycle (butanediol fermentation) in microorganisms." . . "Acetoin catabolism" . "3-hydroxy-2-butanone breakdown" . "3-hydroxy-2-butanone catabolic process" . "3-hydroxy-2-butanone catabolism" . "3-hydroxy-2-butanone degradation" . "Acetoin breakdown" . "Acetoin catabolic process" . "Acetoin degradation" . . .