On the chain flexibility of arabinoxylans and other β-(l→4) polysaccharides
On the chain flexibility of arabinoxylans and other β-(l→4) polysaccharides
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DOI：
10.1016/s0008-6215(02)00281-1
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发表时间：
2002-10-11
影响因子：
3.1
通讯作者：
Ross-Murphy, SB
中科院分区：
文献类型：
--
作者：
Picout, DR;Ross-Murphy, SB
最近由Dervilly-Pinel和他的同事(Carbohyr.Res.2001,330,365-372)提供了从小麦面粉中提取和分级的一系列脱酯阿拉伯木聚糖的完整的大分子表征。从他们的测量中，他们能够提取与链灵活性相关的参数，如Mark-Houwink指数a和链持续长度。然而，他们对后一个参数的估计比预期的要大得多，因为阿拉伯木聚糖的主链像纤维素和半乳甘露糖一样是β-(1-gt；4)。通过以另一种但被广泛接受的方式处理他们的数据，我们能够获得较低的持续长度值，这与文献中对纤维素这个参数的估计以及我们自己最近对一系列不同取代的半乳甘露糖的测量结果很好地吻合。这些结果表明，所获得的参数可能适用于其他β-(1->；4)多糖。(C)2002爱思唯尔科学有限公司。保留所有权利。
The recent paper by Dervilly-Pinel and co-workers (Carbohydr. Res. 2001, 330, 365-372) presents a complete macromolecular characterisation of a series of de-esterified arabinoxylans extracted and fractionated from wheat flour. From their measurements, they were able to extract parameters related to chain flexibility, such as the Mark-Houwink exponent a and the chain persistence length. However, the estimate they obtain for the latter parameter is rather larger than would be expected, since the arabinoxylan backbone is beta-(1-->4) like cellulose and the galactomarmans. By treating their data in an alternative, but well accepted manner, we are able to obtain a lower value of persistence length, which agrees well with estimates for this parameter for cellulose, in the literature, and our own recent measurements for a series of differently substituted galactomarmans. These results suggest that the parameters obtained may be applicable to other beta-(1-->4) polysaccharides. (C) 2002 Elsevier Science Ltd. All rights reserved.