GST-type enzymes may be involved in an enzyme complex formed by CYP83s and C-S lyase. The S-alkylthiohydroximate formed after CYP83-catalyzed aldoxime oxidation and spontaneous conjugation to cysteine is cyclized in vitro to form a dead-end product. Hence metabolic channeling aided by GST-type enzymes is postulated in vivo to avoid this consequence the dead-end product. The two putative GST genes (At3g03190 and At1g78370) could be candidates coding for such an activity (Hirai et al. 2005)