NCIt definition : A membrane-bound enzyme complex expressed in neutrophils or in cells of the vasculature
and thyroid that faces the extracellular space and catalyzes the production of a superoxide
free radical by transferring one electron to oxygen from (nicotinamide adenine dinucleotide
phosphate) NADPH. In neutrophils, the superoxide is generated as part of the respiratory
burst involved in immune responses.;