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Protein amino acid residues and a new monolignol conjugate in lignins and their interference with p-hydroxyphenyl (H) unit estimation - Póster presentación

AuthorsKim, Hoon; Padmakshan, D.; Li, Yanding; Rencoret, Jorge CSIC ORCID; Karlen, S.D.; Río Andrade, José Carlos del CSIC ORCID ; Hatfield, R.D.; Ralph, John
Klason lignin
Issue Date26-Jun-2018
PublisherUniversidade de Aveiro
Citation15th European Workshop on Lignocellulosics and Pulp 51-54 (2018)
AbstractWe elucidated the detailed structures of the residual protein peaks, phenylalanine and tyrosine, in 2D NMR spectra from corn cob and kenaf samples. Phenylalanine¿s 3/5 correlation peak is superimposed on the peak from typical lignin p-hydroxyphenyl (H-unit) structures, causing an overestimation of the H units. We used a protease to remove the protein residues from the ballmilled cell walls. Additionally, we also identified a new monolignol conjugate, ML-benzoate (BA), in the cell wall samples of leaf tissues from Canary Island date palm (Phoenix canariensis) and also a small amount from macaúba (Acrocomia aculeata (Jacq.) Lodd. ex Mart.) endocarp (and a trace in the stem) along with stilbenes, also causing an overestimation of the H units.
Description4 páginas.-- 3 figuras.-- 7 referencias.-- Poster presentación en el 15th European Workshop on Lignocellulosics and Pulp June 26-29, 2018 Aveiro, Portugal
Appears in Collections:(IRNAS) Comunicaciones congresos

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