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Comparative evaluation of gliadins from four extraction protocols using advanced analytical techniques
Monika Rani1, Raashid Ahmad Siddiqi1, Gurbir Singh2
1Department of Food Science and Technology, Guru Nanak Dev University, Amritsar, Punjab, India.
International Journal of Biological Macromolecules
|October 29, 2021
Summary
This study compares four gliadin extraction methods, revealing the DuPont method yields gliadin with higher zeta potential and varied morphology. These findings are crucial for analyzing gluten-free products and understanding celiac disease triggers.
Area of Science:
- Food Science
- Protein Chemistry
- Analytical Chemistry
Background:
- Gliadin, a key gluten protein, is implicated in celiac disease.
- Accurate gliadin extraction is vital for studying its properties and presence in gluten-free foods.
Purpose of the Study:
- To evaluate and compare four distinct gliadin extraction procedures (Osborne, Weiss, Wallace, DuPont).
- To characterize gliadin properties, including morphology and particle size, using advanced analytical techniques.
- To assess the impact of different extraction methods on gliadin characteristics.
Main Methods:
- Investigated six wheat cultivars using four extraction methods: Osborne (1924), Weiss (1993), Wallace (1989), and DuPont (2005).
- Employed advanced analytical techniques: Dynamic Light Scattering (DLS), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM).
Main Results:
- The DuPont extraction method resulted in the highest zeta potential (23.53-27).
- Particle size exhibited an inverse relationship with the Polydispersity index.
- TEM revealed compact globular and rod-shaped particle arrangements, depending on the extraction method.
- XRD analysis confirmed the presence of crystalline domains in gliadin.
Conclusions:
- Extraction method significantly influences gliadin properties, including zeta potential and morphology.
- The DuPont method appears effective for extracting gliadin with distinct characteristics.
- Understanding these variations is essential for accurate gliadin analysis in food products and celiac disease research.
