Transcript analysis of htf1 in Trichoderma reesei CREI-mutant strains. QM6a-CREI96 (red bars) and the Δcre1-strain (blue bars) were grown on D-glucose and samples were drawn after 36, 39, 42, and 45 hours (a) or pre-grown on glycerol and transferred to sophorose for 30, 90, and 180 minutes (b). The transcript levels were analyzed by qPCR using sar1 and act genes for data normalization and levels refer to QM6a-CREI96 grown for 36 hours or incubated for 30 minutes, respectively. The values are means from measurements in triplicates and three biological experiments (cultivations). Error bars indicate standard deviations.