Amylopectin molecular structure in relation to physicochemical properties of quinoa starch
1School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
Abstract:
Structure-function relationships of starch components remain a subject of research interest. Quinoa starch has very small granules (∼2μm) with unique properties. In this study, nine quinoa starches varied greatly in composition, structure, and physicochemical properties were selected for the analysis of structure-function relationships. Pearson correlation analysis revealed that the properties related to gelatinization such as swelling power, water solubility index, crystallinity, pasting, and thermal properties are much affected by the amylopectin chain profile and amylose content. The parameters of gel texture and amylose leaching are much related to amylopectin internal structure. Other properties such as enzyme susceptibility and particle size distribution are also strongly correlated with starch composition and amylopectin structure. Interesting findings indicate the importance of amylopectin internal structure and individual unit chain profile in determining the physicochemical properties of starch. This work highlights some relationships among composition, amylopectin structure and physicochemical properties of quinoa starch.
Related Concept Videos
Protein and Protein Structure
A protein's shape is critical to its function. For example, an enzyme...
Chemistry of Carbohydrates
Protein Organization
Protein Organization
The primary structure of a protein is its amino acid sequence....
Protein Folding
Protein Folding
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...


