Influence of pH on the dry heat-induced denaturation/aggregation of whey proteins

M. Gulzar S. Bouhallab Romain Jeantet 1 P. Schuck Thomas Croguennec 1
1 STLO - Science et Technologie du Lait et de l'Oeuf
Abstract : The effect of pH on the heat-induced denaturation/aggregation of whey protein isolate (WPI) in the dry state was investigated. WPI powders at different pH values (6.5, 4.5, and 2.5) and controlled water activity (0.23) were dry heated at 100 degrees C for up to 24 h. Dry heating was accompanied by a loss of soluble proteins (native-like beta-lactoglobulin and alpha-lactalbumin) and the concomitant formation of aggregated structures that increased in size as the pH increased. The loss of soluble proteins was less when the pH of the WPI was 2.5
Keywords : Whey proteins Dry heating Protein cross-linking Disulphide bonds Protein hydrolysis egg-white proteins surface functional-properties beta-lactoglobulin ab induced aggregation gelling properties alpha-lactalbumin water-content glycation state phosphorylation
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Journal articles
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Submitted on : Friday, September 7, 2012 - 3:31:07 PM
Last modification on : Thursday, February 20, 2020 - 7:22:49 PM

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AGROCAMPUS-OUEST | UNAM | INRA | AGROCAMPUS-OUEST-UMR-STLO

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M. Gulzar, S. Bouhallab, Romain Jeantet, P. Schuck, Thomas Croguennec. Influence of pH on the dry heat-induced denaturation/aggregation of whey proteins. Food Chemistry, Elsevier, 2011, 129 (1), pp.110-116. ⟨10.1016/j.foodchem.2011.04.037⟩. ⟨hal-00729268⟩

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