NAD(P)H dehydrogenase complex (plastoquinone) Complex that possesses NAD(P)H dehydrogenase (plastoquinone) activity. The complex is one of the components of the electron transport chain. It is involved in electron transport from an unidentified electron donor, possibly NADH, NADPH or ferredoxin(Fd) to the plastoquinone pool. cellular_component GO:0010598 catalytic complex