Key Methodologies in Characterizing the Multi-Scale Structures of Gluten Proteins in Dough: A Comparative Review

Area of Science:

• Food Science
• Materials Science
• Biochemistry

Background:

• Gluten proteins are essential for wheat flour functionality, influencing dough formation and product quality.
• Gluten proteins exhibit a complex, hierarchical multi-scale structure (molecular, aggregate, network) that is challenging to characterize.
• Current characterization techniques are limited, necessitating further exploration and comparative analysis.

Purpose of the Study:

• To review and present current techniques for multi-scale gluten protein structural characterization.
• To compare the advantages and disadvantages of various analytical methods.
• To outline future challenges and perspectives in gluten protein analysis.

Main Methods:

• Molecular scale: Electrophoresis, HPLC, proteomics, FT-IR, FT-Raman spectroscopy.
• Aggregate scale: SEC, AFFF, DLS, MALS, RI, UV absorbance.
• Network scale: CLSM, SEM, Confocal Raman microscopy, TPE microscopy.

Main Results:

• Detailed principles, operational aspects, and result interpretation for each technique are presented.
• Comparative analysis highlights the strengths and weaknesses of similar methods for scenario-based selection.
• Identification of limitations and future directions for gluten structural characterization.

Conclusions:

• A comprehensive overview of multi-scale gluten protein characterization techniques is provided.
• The review facilitates informed selection of appropriate methods for specific research needs.
• Future research should focus on advancing and integrating techniques for a more complete understanding of gluten structure-function relationships.