Figure 8From: Cloning and characterization of a 9-lipoxygenase gene induced by pathogen attack from Nicotiana benthamianafor biotechnological applicationThe effects of cysteine levels and reaction periods on the product profile. Linoleic acid (600 μM) was incubated with yeast extract expressing Nb-9-LOX and different concentrations of cysteine at 35°C for 1 hour. The product was detected by LC-MS. (A) Ultraviolet detection at 234 nm. Peak 1, 9-HPOD; peak 2, 9-HOD. The concentrations of cysteine are given. (B) Relative amounts of 9-HPOD and 9-HOD calculated from LC-MS analysis of peak 1 (9-HPOD) and peak 2 (9-HOD) from (A). (C) Relative amounts of 9-HPOD and 9-HOD calculated from LC-MS analysis of products formed from the reaction containing 600 μM of linoleic acid, yeast extract expressing Nb-9-LOX, and 2.4 mM of cysteine at 35°C after different reaction periods. The production of 9-HPOD was monitored at m/z 335 [M+Na]+, and of 9-HOD at m/z 319 [M+Na]+. The highest amount was defined as 1. Each bar represents the mean and standard error of three replicates.Back to article page