THF co-solvent pretreatment prevents lignin redeposition from interfering with enzymes yielding prolonged cellulase activity

Table 1 Quantitative information (expressed as %) for lignin subunits, hydroxycinnamates, and inter-linkages in DSA, THF-washed DSA switchgrass, and lignin recovered from wash liquid of THF-washed DSA switchgrass

	DSA switchgrass	THF-washed DSA switchgrass	Lignin recovered from wash liquid of THF-washed DSA switchgrass
Lignin subunits
S	27.9	40.2	30.7
G	52.5	50.6	48.3
H	19.6	9.2	21.0
S/G ratio	0.53	0.79	0.64
Hydroxycinnamates
FA	16.8	33.7	10.6
pCA	16.8	59.0	11.4
Interunit linkages
β-O-4	18.4	40.2	9.7
β-5	6.1	8.0	4.8
β–β	0.6	1.2	0.5

Compositions are expressed as a fraction of S + G + H
S: syringyl unit, G: guaiacyl unit, H: p-hydroxyphenyl unit, FA: ferulate, pCA: p-coumarate, β-O-4: β-aryl ether, β-5: phenylcoumaran, β–β: resinol

ISSN: 2731-3654