Effect of glucose on expression of the carotenoid biosynthesis genes in X. dendrorhous. The gene expression kinetics in the wild-type strain after adding glucose (20 g/l final concentration) was determined with respect to the control (black circle) for the carotenogenesis genes and for the grg2 and PDC genes. a: grg2 (white inverted triangle) and PDC (black square); b: mmcrtYB (white circle) and amcrtYB (black inverted triangle); c: mmcrtI (white circle) and amcrtI (black inverted triangle); d: crtS (white circle). The error bars correspond to the standard deviation (n = 3). The negative values on the y-axis denote decreases relative to the control. mm: mature transcript, am: alternative transcript.