Fig. 3: Structural comparison of cellulolytic enzyme lignin (CEL) from untreated corn stover, alkaline lignin (AL) from NaOH pretreatment, and diethylamine-treated lignin (DEA-L) from the fractionation with 40% v/v DEA.
1H-13C cross signals and semi-quantitative information on interunit linkages and lignin units.
