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Isotherms of Cel binding to lignin with and without LS application at 25°C and pH 5.2. The lignin was the hydrolysis lignin residuals from solid substrate SP-Po-A1B4 (see Table 3 for details about SP-Po-A1B4). Cel, cellulase; LS, lignosulfonate; SPORL, sulfite pretreatment to overcome recalcitrance of lignocellulose.
