CLR1 and CLR2 are light dependent regulators of xylanase and pectinase genes in Trichoderma reesei.

Regulation of plant cell wall degradation is of utmost importance for understanding the carbon cycle in nature, but also to improve industrial processes aimed at enzyme production for next generation biofuels. Thereby, the transcription factor networks in different fungi show conservation as well as striking differences, particularly between Trichoderma reesei and Neurospora crassa. Here, we aimed to gain insight into the function of the transcription factors CLR1 and CLR2 in T.