The site of production of superoxide radical in mitochondrial Complex I is not a bound ubisemiquinone but presumably iron-sulfur cluster N2. Genova ML, Ventura B, Giuliano G, Bovina C, Formiggini G, Parenti Castelli G, Lenaz G FEBS Lett. 2001 Sep 21; 505(3):364-8. PMID: 11576529. Abstract CommentRecommendBookmarkWatch