Comprehensive Structural Characterization of Wheat Bran Lignin.

ABSTRACT: Wheat bran is a large volume sidestream of wheat flour production and is used in food and feed applications. Despite great advances in the characterization of the wheat bran hemicellulose component, thus far, only limited attention has been paid to wheat bran lignin. Here, we describe the comprehensive structural characterization of wheat bran lignin, facilitated by sequential enzymatic starch and protein removal, followed by mild γ-valerolactone organosolv extraction and extensive purification. Quantitative ¹³C-IS pyrolysis-GC-MS and HSQC NMR revealed that wheat bran lignin is enriched in syringyl subunits (S/G ∼ 0.9), as compared to wheat straw lignin (typical S/G ∼ 0.5), but surprisingly poor in p-coumarate incorporated (<1 per 100 aromatic rings), entirely free of tri

SUBMITTER: van Erven G 

PROVIDER: S-EPMC12007093 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature