Ecto-NOX disulfide-thiol exchanger 1 (ENOX1)

Probably functions as a terminal oxidase of plasma electron transport from cytosolic NAD(P)H through hydroquinones to acceptors at the cell surface. Hydroquinone oxidase activity alternates with a protein disulfide-thiol interchange/oxidoreductase action which might control physical membrane displacements associated with vesicle budding or cell enlargement.

The activities oscillate with a period length of 24 minutes and play a role in charge of the ultradian cellular biological clock. .