Characterization of CYP1A1 activity in the CYP1A1 expressing strains. Mean CYP1A1 activity as determined by EROD assay where the amount of fluorescent product produced is directly proportional to CYP1A1 activity. A, Characterization in the presence of the P450 inhibitor α-NF and PSII inhibitor DCMU (+DCMU). B, Characterization during a light gradient of decreasing irradiance, ranging from standard light growing conditions (200 µmol photons m⁻² s⁻¹) to reduced light conditions (14 µmol photons m⁻² s⁻¹). Different letters indicate significant difference between strains (one-way ANOVA, Tukey’s post hoc test, P-value < 0.05). Each value is the mean of three independent replicates, error bars represent standard deviation of the mean.