Enables monooxygenase activity. Acts upstream of or within xenobiotic metabolic process. Predicted to be located in intracellular membrane-bounded organelle. Is expressed in brain; cortical renal tubule; late tubule; and testis. Orthologous to human FMO1 (flavin containing dimethylaniline monoxygenase 1). [provided by Alliance of Genome Resources, Apr 2022]