Production of carotenoids and <i>carRA</i>/<i>carB</i> gene expression in the <i>acyA</i>⁺ and Δ<i>acyA</i> strains.

<p>A: Carotenoid content in mycelia grown for 7 days on minimal medium in the dark or under continuous illumination. The data show average and standard deviations for the amounts of polar (upper bars) and neutral (lower bars) carotenoids in two independent experiments. The chemical formula of neurosporaxanthin (Nx) is shown above. B: mRNA levels of the enzymatic genes for the carotenoid pathway <i>carRA</i> and <i>carB</i> in the same strains grown in the dark or illuminated for 30 or 60 min. Data show average and standard deviation from two independent experiments. Relative mRNA levels are referred to the value of the wild type in the dark.