Contributes to superoxide-generating NAD(P)H oxidase activity. Involved in several processes, including cellular response to gamma radiation; cellular response to organonitrogen compound; and positive regulation of cell population proliferation. Located in several cellular components, including apical plasma membrane; focal adhesion; and stress fiber. Part of NADPH oxidase complex. Colocalizes with perinuclear endoplasmic reticulum. Used to study hypertension and pulmonary hypertension. Biomarker of diabetic retinopathy; end stage renal disease; hypertension; and myocardial infarction. Human ortholog(s) of this gene implicated in artery disease (multiple); asthma; chronic obstructive pulmonary disease; and phagocyte bactericidal dysfunction (multiple). Orthologous to human CYBA (cytochrome b-245 alpha chain). [provided by Alliance of Genome Resources, Apr 2022]