title: Structure and morphology of wheat gluten films: from polymeric protein aggregates toward superstructure arrangements.
abstract: Evaluation of structure and morphology of extruded wheat gluten (WG) films showed WG protein assemblies elucidated on a range of length scales from nano (4.4 Å and 9 to 10 Å, up to 70 Å) to micro (10 μm). The presence of NaOH in WG films induced a tetragonal structure with unit cell parameters, a = 51.85 Å and c = 40.65 Å, whereas NH(4)OH resulted in a bidimensional hexagonal close-packed (HCP) structure with a lattice parameter of 70 Å. In the WG films with NH(4)OH, a highly polymerized protein pattern with intimately mixed glutenins and gliadins bounded through SH/SS interchange reactions was found. A large content of β-sheet structures was also found in these films, and the film structure was oriented in the extrusion direction. In conclusion, this study highlights complexities of the supramolecular structures and conformations of wheat gluten polymeric proteins in biofilms not previously reported for biobased materials.
authors: Department of Agriculture-Farming Systems, Technology and Product Quality, The Swedish University of Agricultural Sciences, Alnarp, Sweden. ramune.kuktaite@ltj.slu.se
authors: Ramune
authors: R
authors: Kuktaite
authors: Tomás S
authors: TS
authors: Plivelic
authors: Yngve
authors: Y
authors: Cerenius
authors: Mikael S
authors: MS
authors: Hedenqvist
authors: Mikael
authors: M
authors: Gällstedt
authors: Salla
authors: S
authors: Marttila
authors: Rickard
authors: R
authors: Ignell
authors: Yves
authors: Y
authors: Popineau
authors: Oliver
authors: O
authors: Tranquet
authors: Peter R
authors: PR
authors: Shewry
authors: Eva
authors: E
authors: Johansson
mesh_terms: D001704:Biopolymers / Q000737:chemistry*; D005983:Glutens / Q000737:chemistry*; D010940:Plant Proteins / Q000737:chemistry*; D014908:Triticum / Q000737:chemistry*
chemical_list: D001704:Biopolymers; D010940:Plant Proteins; D005983:Glutens