A enzyme complex of which the core is a heterodimer composed of a light (alpha) and heavy (beta) chain, and requires several other water-soluble proteins of cytosolic origin for activity. Functions in superoxide generation by the NADPH-dependent reduction of O2. [ http://www.ncbi.nlm.nih.gov/pubmed/11483596 http://www.ncbi.nlm.nih.gov/pubmed/12440767 ]