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Pichia pastoris and Trichoderma reesei are efficient and useful microbial cell factories for the production of industrial proteins.Heterologous expression of β-glucosidase is necessary to enhance the efficiency of fungal cellulase preparations.Glycosylation is one of the main post-translational modifications occurring in the secretory pathway.It has been reported that N-glycosylation affects the structure framework, function and stability of proteins.