Igartuburu J M, Pando E, Rodríguez-Luis F, Gil-Serrano A
Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Apdo 40. 11510, Puerto Real, Cádiz, Spain.
J Nat Prod. 1998 Jul;61(7):876-80. doi: 10.1021/np9702401.
The structure of one of the hemicellulose A fractions (HA-1) extracted from the seeds of the grape variety Palomino (Vitis vinifera cv. Palomino) has been studied by means of methylation, 1H NMR, 13C NMR, and partial hydrolysis. This hemicellulose seems to be a homogeneous polysaccharide with an apparent molecular weight of 68 500. Its structure is that of an acidic xylan, a linear chain of beta-D-xylopyranosyl units, bonded together by (1-->4) glycosidic links, containing single alpha-D-xylopyranosyl and 4-O-methyl-alpha-D-glucopyranuronosyl residues joined by glycosidic links to position 2 of the xylose units of the main chain, in proportions of one residue to every 25 units of xylose.
通过甲基化、1H核磁共振、13C核磁共振和部分水解等方法，对从葡萄品种帕洛米诺（Vitis vinifera cv. Palomino）种子中提取的一种半纤维素A组分（HA - 1）的结构进行了研究。这种半纤维素似乎是一种表观分子量为68500的均质多糖。其结构为酸性木聚糖，是由β - D - 吡喃木糖基单元通过（1→4）糖苷键连接而成的线性链，含有通过糖苷键连接到主链木糖单元2位的单个α - D - 吡喃木糖基和4 - O - 甲基 - α - D - 吡喃葡萄糖醛酸残基，其比例为每25个木糖单元中有一个残基。
