Mechanism of the Flavoprotein d-6-Hydroxynicotine Oxidase: Substrate Specificity, pH and Solvent Isotope Effects, and Roles of Key Active-Site Residues. - Fitzpatrick PF; Dougherty V; Subedi B; Quilantan J; Hinck CS; Lujan AI; Tormos JR (Biochemistry, 2019)