Isolation, Physicochemical Properties, and Structural Characteristics of Arabinoxylan from Hull-Less Barley
Arabinoxylan (HBAX-60) was fractioned from alkaline-extracted arabinoxylan (HBAX) in the whole grain of hull-less barley ( L. Hook. f. ) by 60% ethanol precipitation, which was studied for physicochemical properties and structure elucidation. Highly purified HBAX-60 mainly composed of arabinose (40....
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Veröffentlicht in: | Molecules (Basel, Switzerland) Switzerland), 2021-05, Vol.26 (10), p.3026 |
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Sprache: | eng |
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Zusammenfassung: | Arabinoxylan (HBAX-60) was fractioned from alkaline-extracted arabinoxylan (HBAX) in the whole grain of hull-less barley (
L.
Hook. f.
) by 60% ethanol precipitation, which was studied for physicochemical properties and structure elucidation. Highly purified HBAX-60 mainly composed of arabinose (40.7%) and xylose (59.3%) was created. The methylation and NMR analysis of HBAX-60 indicated that a low-branched β-(1→4)-linked xylan backbone possessed un-substituted (1,4-linked β-Xyl
, 36.2%), mono-substituted (β-1,3,4-linked Xyl
, 5.9%), and di-substituted (1,2,3,4-linked β-Xyl
, 12.1%) xylose units as the main chains, though other residues (α-Ara
-(1→, β-Xyl
-(1→, α-Ara
-(1→3)-α-Ara
-(1→ or β-Xyl
-(1→3)-α-Ara
-(1→) were also determined. Additionally, HBAX-60 exhibited random coil conformation in a 0.1 M NaNO
solution. This work provides the properties and structural basis of the hull-less barley-derived arabinoxylan, which facilitates further research for exploring the structure-function relationship and application of arabinoxylan from hull-less barley. |
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ISSN: | 1420-3049 1420-3049 |
DOI: | 10.3390/molecules26103026 |