Journal ArticleDOI
The double-helical nature of the crystalline part of A-starch.
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A new three-dimensional structure of the crystalline part of A-starch is described in which the unit cell contains 12 glucose residues located in two left-handed, parallel-stranded double helices packed in a parallel fashion; four water molecules are located between these helices.About:
This article is published in Journal of Molecular Biology.The article was published on 1988-05-20. It has received 561 citations till now. The article focuses on the topics: Helix & Pyranose.read more
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Double helix formation from non-natural amylose analog polysaccharides.
TL;DR: Double helix formation from the non-natural anionic and cationic amylose analog polysaccharides (amylouronic acid and amylosamine, respectively) was achieved through electrostatic interactions and a water-insoluble complex was obtained by simply mixing the two poly Saccharides in water.
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Physicochemical characterization of corn–sorghum nixtamalized flours as a function of the steeping time
Ezequiel Hernández-Becerra,Maria Paulina Gutierrez-Oñate,Gerardo Martinez-Soto,Lineth J. Vega-Rojas,A.A. Acosta-Osorio,Margarita Contreras-Padilla,Mario E. Rodríguez-García,Mario E. Rodríguez-García +7 more
TL;DR: In this article, the physicochemical properties of nixtamalized corn and sorghum flours, as well as combined corn-sorghum-flours with 10, 20, and 30% of the total grain fraction were studied.
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Chirality as an Instrument of Stratification of Hierarchical Systems in Animate and Inanimate Nature
TL;DR: In this article, a synergetic law was formulated for the spontaneous formation of a succession of hierarchical levels with alternating chirality sign of de-novo formed structures and with an increase of the structures' relative scale.
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Glycoscience@Synchrotron: Synchrotron radiation applied to structural glycoscience.
Serge Pérez,Daniele de Sanctis +1 more
TL;DR: The present review illustrates how synchrotron-based experiments have contributed to understanding in the field of structural glycobiology by covering structural characterization of protein–carbohydrate interactions of the families of most glycan-interacting proteins.
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A general method for the derivation of the functional forms of the effective energy terms in coarse-grained energy functions of polymers. II. Backbone-local potentials of coarse-grained O1→4-bonded polyglucose chains.
Emilia A. Lubecka,Adam Liwo +1 more
Abstract: Based on the theory of the construction of coarse-grained force fields for polymer chains described in our recent work [A K Sieradzan et al, J Chem Phys 146, 124106 (2017)], in this work effective coarse-grained potentials, to be used in the SUGRES-1P model of polysaccharides that is being developed in our laboratory, have been determined for the O⋯O⋯O virtual-bond angles (θ) and for the dihedral angles for rotation about the O⋯O virtual bonds (γ) of 1 → 4-linked glucosyl polysaccharides, for all possible combinations of [α,β]-[d,l]-glucose The potentials of mean force corresponding to the virtual-bond angles and the virtual-bond dihedral angles were calculated from the free-energy surfaces of [α,β]-[d,l]-glucose pairs, determined by umbrella-sampling molecular-dynamics simulations with the AMBER12 force field, or combinations of the surfaces of two pairs sharing the overlapping residue, respectively, by integrating the respective Boltzmann factor over the dihedral angles λ for the rotation of the
References
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Relationship between the distribution of the chain length of amylopectin and the crystalline structure of starch granules
TL;DR: The distribution of chain lengths in the amylopectins of starches from 20 species (11 A-, 6 B-, and 3 C-type) were characterised by h.p.l.c. as mentioned in this paper.
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The double-helical molecular structure of crystalline b-amylose☆
TL;DR: The crystal structure of A-amylose is based on parallel-stranded, right-handed double helices as mentioned in this paper, which results in nearly hexagonal close-packing, and the similarities in packing suggest that interconversions of A and B are possible.
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Molecular organization in starches: a carbon 13 CP/MAS NMR study
TL;DR: In this article, the authors used cross polarization/magic angle spinning (CP/MAS) 13C NMR spectra for starches from various botanical origins and analyzed by comparison with model materials.
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Method for Calculating Internal Rotation Barriers
Roy A. Scott,Harold A. Scheraga +1 more
TL;DR: It was found that U0 was essentially constant within each class, thus allowing these average values to be used to calculate ΔU for all molecules in each class and satisfying agreement between the calculated values and experimental values of ΔU was found.