Enables NAD(P)H oxidase H2O2-forming activity. Involved in several processes, including cellular response to cAMP; cellular response to gamma radiation; and positive regulation of stress fiber assembly. Located in several cellular components, including apical plasma membrane; focal adhesion; and perinuclear endoplasmic reticulum. Part of NADPH oxidase complex. Colocalizes with stress fiber. Used to study hypertension. Biomarker of hypertension and non-alcoholic steatohepatitis. Orthologous to human NOX4 (NADPH oxidase 4). [provided by Alliance of Genome Resources, Apr 2022]