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Kinetics of Whey Protein Glycation Using Dextran and the Dry-Heating Method.

Na Li1, Abhiram Arunkumar2, Mark R Etzel1

  • 1Department of Food Science, University of Wisconsin, 1605 Linden Drive, Madison, WI 53706, USA.

Foods (Basel, Switzerland)
|November 17, 2019
PubMed
Summary
This summary is machine-generated.

This study investigated the kinetics of protein-polysaccharide glycation using whey protein isolate (WPI) and glycomacropeptide (GMP) with dextran. It found high yields and determined reaction rates, offering valuable insights for industrial food applications.

Keywords:
carbohydratesconjugationdairy

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Area of Science:

  • Food Science
  • Biochemistry
  • Chemical Kinetics

Background:

  • Protein glycation via the Maillard reaction enhances food protein functionality.
  • Existing research focuses on glycated food properties, neglecting reaction kinetics and yield.
  • Industrial glycation requires understanding reaction kinetics and equilibrium yield.

Purpose of the Study:

  • To examine the kinetics and yield of whey protein isolate (WPI) and glycomacropeptide (GMP) glycation with dextran using dry-heating.
  • To quantify reaction rates and equilibrium yields for industrial applications.

Main Methods:

  • Dry-heating method at 70 °C and 80% relative humidity.
  • Chromatographic analysis and SDS-PAGE with fluorescence laser densitometry to monitor glycation.
  • Fitting data to a first-order reversible kinetic model.

Main Results:

  • WPI-dextran glycation rate constants (k) were similar whether measured by SDS-PAGE (0.33 h⁻¹) or chromatography (0.38 h⁻¹).
  • GMP-dextran glycation was slower (k = 0.13 h⁻¹) than WPI-dextran, attributed to lower Lys content in GMP.
  • High yields were achieved: 89% for WPI and 87% for GMP.

Conclusions:

  • The study provides crucial kinetic and yield data for protein-polysaccharide glycation.
  • Findings support the industrial expansion of glycated proteins in food product development.
  • Understanding glycation kinetics is essential for optimizing food ingredient manufacturing.