3NH3:
reference: Crystal structure analysis of free and substrate-bound 6-hydroxy-L-nicotine oxidase from Arthrobacter nicotinovorans., Kachalova GS, Bourenkov GP, Mengesdorf T, Schenk S, Maun HR, Burghammer M, Riekel C, Decker K, Bartunik HD, J Mol Biol. 2010 Feb 26;396(3):785-99. Epub 2009 Dec 16. PMID: 20006620

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