The function of DUOXA2 (dual oxidase maturation factor 2, ENSG00000140274) is as follows. Required for the maturation and transport of functional DUOX2 from the endoplasmic reticulum to the plasma membrane (PubMed:16651268). Recruits DUOX2 to the apical cell membrane (PubMed:39126279). {ECO:0000269|PubMed:16651268, ECO:0000269|PubMed:39126279}.