The core carbohydrate structure of Acacia seyal var. seyal (Gum arabic)

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• 作者：Shao-Ping Nie^a ; ^b ; ^{spnie@ncu.edu.cn} ; Cathy Wang^b ; ^{Cathy.Wang@agr.gc.ca} ; Steve W. Cui^a ; ^b ; ^{cuis@agr.gc.ca} ; Qi Wang^b ; ^{wangq@agr.gc.ca} ; Ming-Yong Xie^a ; ^{xmync@sina.com.cn} ; Glyn O. Phillips^c ; ^d ; ^{phillipsglyn@aol.com}
• 关键词：Gum arabic ; Acacia seyal ; Structural features ; Methylation analysis ; 2D NMR
• 刊名：Food Hydrocolloids
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：32
• 期：2
• 页码：221-227
• 全文大小：833 K

文摘

The structure of gum arabic (Acacia seyal) has been studied using methylation analysis and 2D (COSY, TOCSY, HMQC and HMBC) NMR spectroscopy. Galacturonic acid (13.66 % ) is a major component not previously identified. The backbone is made up of 1,3-linked galactopyranosyl (Galp) residues substituted at O-2, O-6 or O-4 positions, which are terminated with mainly arabinofuranosyl (Araf), galacturonopyranosyl (GalpA), rhamnopyranosyl (Rhap), but occasionally with arabinopyranosyl (Arap), and glucuronopyranosyl (GlcpA) residues. There are long side chains of ¡ú3)-¦Á-l-Araf-(1¡ú and ¡ú2)-¦Á-l-Araf-(1¡ú linked to the backbone.