A structured understanding of cellobiohydrolase I binding to poplar lignin fractions after dilute acid pretreatment.

ABSTRACT:

Background

Cellulase adsorption to lignin is considered a cost barrier for bioethanol production; however, its detailed association mechanism is still not fully understood. In this study, two natural poplar variants with high and low sugar release performance were selected as the low and high recalcitrant raw materials (named L and H, respectively). Three different lignin fractions were extracted using ethanol, followed by p-dioxane and then cellulase treatment from the dilute acid pretreated poplar solids (fraction 1, 2, and 3, respectively).

Results

Each lignin fraction had different physicochemical properties. Ethanol-extracted lignin had the lowest weight average molecular weight, while the molecular weights for the other two lignin fractions were si

SUBMITTER: Yao L 

PROVIDER: S-EPMC5883885 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature