CONFORMATIONAL FEATURES OF GALACTURONANS .2. CONFIGURATIONAL STATISTICS OF PECTIC POLYMERS

被引：16

作者：

RUGGIERO, JR

URBANI, R

CESARO, A

机构：

[1] Department of Biochemistry, Biophysics and Macromolecular Chemistry, University of Trieste

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 1995年 / 17卷 / 3-4期

关键词：

GALACTURONANS; CONFIGURATIONAL STATISTICS; PECTIN;

D O I：

10.1016/0141-8130(95)92688-M

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The unperturbed dimensions of poly-alpha-D-galacturonic acid (PGA) as a function of the degree of polymerization (n) and degree of ionization (%GalA(-)) have been determined by molecular mechanics and Monte Carlo methods. Chain extensions appear to depend substantially on contributions arising from local redistributions of charge on charged and uncharged galacturonic acid residues. Inclusion of methyl-esterified galacturonic acid units results in increased chain extensions. Incorporation of alpha-(1 --> 2)-L-rhamnose units causes abrupt changes in chain propagation and a reduction in calculated chain extension.

引用

页码：213 / 218

页数：6

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