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. 2015 Jul 21;6:539. doi: 10.3389/fpls.2015.00539

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Copyright © 2015 Lemarié, Robert-Seilaniantz, Lariagon, Lemoine, Marnet, Levrel, Jubault, Manzanares-Dauleux and Gravot.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Camalexin biosynthesis pathway according to Millet et al. (2010) and Geu-Flores et al. (2011). Camalexin is derived from tryptophan which is firstly converted to indole 3 acetaldoxime (IAOx) by the cytochrome P450 enzymes CYP79B2 and CYP79B3. IAOx is then converted to indole 3 acetonitrile (IAN) by the CYP71A12 and CYP71A13 enzymes. Subsequently, IAN is converted to the Cys(IAN) conjugate after intermediate steps (represented in dashed arrows). The final two steps in camalexin biosynthesis are catalyzed by the P450 enzyme CYP71B15/PAD3.