“15N Isotope Effects In Nicotine Demethylation In Vivo By Plant Cell Cultures Of Nicotiana Implicate A Role For Cytochrome P450 And A Hydrogen Atom Transfer Mechanism” Robins, R.J., Molinié, R., Kwiecien R.A., Paneth, P., Lebreton, J., Bartholomeusz, T.A., Mesnard, F. PSE meeting, Antalya, April 2006