Fig. 5From: Functional characterization of fungal lytic polysaccharide monooxygenases for cellulose surface oxidationAssessing LPMO (5 µM) activity on SA-Avicel (1%) fiber after 16 h with 1 mM ascorbic acid as an electron donor. T. reesei cellulase cocktail was used to convert all oxidized insoluble products into cellobionic acid and quantify the total C1-oxidized ends introduced to the fiber (nanomoles per mg of starting fiber). Total oxidized ends were obtained by quantifying cellobionic acid by HPAEC-PAD against a standard curve. Each bar is the average of three independent assays measured singly by HPAEC-PAD with error bars indicating the standard error of the meanBack to article page