Fig. 1

Overview of cellulase induction in T. reesei. This figure shows the process of cellulase induction on cellulose and lactose. Initially, the cellulase CEL7A/6A, CEL7B/5A and β-glucosidase CEL3A are involved in the degradation of cellulose, and BGA is essential for the cleavage of lactose. Next, the released mono- and disaccharides could be transported intracellularly through sugar transporters and participate in different metabolic pathways. Among that, different β-glucosidases are critical for efficient cellulase production either on cellulose or lactose, through mediating the accumulation and formation of inducer. The key components and factors are depicted in corresponding areas