2CDU:
reference: The crystal structure of NAD(P)H oxidase from Lactobacillus sanfranciscensis: insights into the conversion of O2 into two water molecules by the flavoenzyme., Lountos GT, Jiang R, Wellborn WB, Thaler TL, Bommarius AS, Orville AM, Biochemistry. 2006 Aug 15;45(32):9648-59. PMID: 16893166

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).