Enzymatic treatment of soy protein isolates: effects on the potential allergenicity, technofunctionality, and sensory properties

Food Science & Nutrition
Pia MeinlschmidtPeter Eisner

Abstract

Soybean allergy is of great concern and continues to challenge both consumer and food industry. The present study investigates the enzyme-assisted reduction in major soybean allergens in soy protein isolate using different food-grade proteases, while maintaining or improving the sensory attributes and technofunctional properties. SDS-PAGE analyses showed that hydrolysis with Alcalase, Pepsin, and Papain was most effective in the degradation of the major soybean allergens with proteolytic activities of 100%, 100%, and 95.9%, respectively. In the course of hydrolysis, the degree of hydrolysis increased, and Alcalase showed the highest degree of hydrolysis (13%) among the proteases tested. DSC analysis confirmed the degradation of major soybean allergens. The sensory experiments conducted by a panel of 10 panelists considered the overall improved sensory properties as well as the bitterness of the individual hydrolysates. In particular, Flavourzyme and Papain were attractive due to a less pronounced bitter taste and improved sensory profile (smell, taste, mouthfeeling). Technofunctional properties showed a good solubility at pH 7.0 and 4.0, emulsifying capacity up to 760 mL g(-1) (Flavourzyme) as well as improved oil-binding capac...Continue Reading

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Citations

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Methods Mentioned

BETA
electrophoresis
differential scanning calorimetry

Software Mentioned

Image [UNK]
TA Universal Analysis
SPSS

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