The properties of two amylase activities which differ in their substrate specificity and subcellular location as well as a chloroplast-associated R-enzyme (debranching activity) are reported. An extrachloroplastic amylase is resolved by gel filtration chromatography into two activities of 80,000 and 40,000 daltons. Both extrachloroplastic activities hydrolyze amylopectin and shellfish glycogen ...

Four starch synthase I (SSI)-deficient rice (Oryza sativa) mutant lines were generated using retrotransposon Tos17 insertion. The mutants exhibited different levels of SSI activities and produced significantly lower amounts of SSI protein ranging from 0% to 20% of the wild type. The mutant endosperm amylopectin showed a decrease in chains with degree of polymerization (DP) 8 to 12 and an increa...

TWO ADENOSINE DIPHOSPHOGLUCOSE: alpha-1,4-glucan alpha-4-glucosyl-transferases were extracted from kernels of waxy maize harvested 22 days after pollination and separated by gradient elution from a diethylaminoethyl-cellulose column. Both fractions could utilize amylopectin, amylose, glycogen, maltotriose and maltose as primers. The rate of glucose transfer from adenosine diphosphoglucose to ra...

Yu S., Xu J., Zhang Y., Kopparapu N.K. (2014): Relationship between intrinsic viscosity, thermal, and retrogradation properties of amylose and amylopectin. Czech J. Food Sci., 32: 514–520. The relationships between intrinsic viscosity and some properties of amylose and amylopectin were investigated. The intrinsic viscosities determined by Ubbelohde viscometer for rice, maize, wrinkled pea and p...

of polysaccharides are synthesized in plastids by similar enzymes using ADP-glucose as a substrate. The storage polysaccharide is usually defined as a mix of two distinct Alain Bulé on § , Paul Colonna § , and Jack Preiss fractions: amylopectin and amylose. Amylopectin is by *Laboratoire de Chimie Biologique far the major compound. It is of very high molecular Unité Mixte de Recherche NЊ111 du ...

Cluster, correlation, and multivariate regression analyses were used to rationalize the effects of grain composition, starch fine structure, and leaching characteristics on cooked rice texture (hardness and stickiness). The head rice grain composition of 23 U.S. long-grain cultivars was evaluated in terms of apparent amylose content, crude protein, and surface lipids. Starch samples were prepar...

Hofvander, P. 2004. Production of amylopectin and high-amylose starch in separate potato genotypes. Doctor ́s dissertation. ISSN 1401-6249, ISBN 91-576-6775-6 Starch is one of the most important processed products from agriculture. Two main outlets can be identified; starch is either enzymatically processed for the production of sweeteners and as raw material for fermentation or channelled to va...

Crystal Research and TechnologyVolume 56, Issue 8 2170024 Cover PictureFree Access Minelarization: Amylopectin Regulated Mineralization of Calcium Carbonate Its Application in Removing Pb(II) (Crystal Technology 8/2021) First published: 13 August 2021 https://doi.org/10.1002/crat.202170024AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare f...

Chinese chestnut (Castanea mollissima Blume) is native to China and distributes widely in arid and semi-arid mountain area with barren soil. As a perennial crop, chestnut is an alternative food source and acts as an important commercial nut tree in China. Starch is the major metabolite in nuts, accounting for 46 ~ 64% of the chestnut dry weight. The accumulation of total starch and amylopectin ...

The effect of the addition of potato or maize on the shear-thickening behavior of semidilute solutions of maize was examined. The experiments were conducted at 25°C using 90/10 weight–weight dimethyl sulfoxide (DMSO)–water as the solvent. The addition of amylose to maize amylopectin reduced and eventually eliminated the observed shear-thickening behavior of maize amylopectin. When potato amylos...