Oxygen supply implies higher production cost and reduction of maximum theoretical yields. Thus, generation fermentation products is more cost-effective. Aiming to find a key piece for the (poly)-3-hydroxybutyrate (PHB) as product, here we characterize an acetoacetyl-CoA reductase, isolated from Candidatus Accumulibacter phosphatis-enriched mixed culture, showing (kcatNADH/KMNADH)/(kcatNADPH/KMN...