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Structural Aspects of Native and Acid or Enzyme Degraded Amylopectins ‐ a 13 C NMR Study
Author(s) -
Falk Heinz,
Micura Ronald,
Stanek Michael,
Wutka Reinhold
Publication year - 1996
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19960480908
Subject(s) - amylopectin , amylose , branching (polymer chemistry) , chemistry , starch , cleavage (geology) , enzyme , stereochemistry , organic chemistry , materials science , fracture (geology) , composite material
13 C NMR signal assignments were achieved for amylopectin (from waxy maize starch) dissolved in dimethylsulfoxide mainly by comparison with the corresponding amylose spectrum and chemical shift arguments. From these data a branching degree of amylose and amylopectin of 1.4±0.5% and 6.0±0.7% could be estimated. Investigation of acid and enzyme degraded amylopectins by means of this method revealed that cleavage by these methods proceeded in an analogous manner. Thus, viewed from the standpoint of structural aspects they yielded virtually identical products.