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  • Title: Collagens for surimi gel fortification: Type-dependent effects and the difference between type I and type II.
    Author: Zhao Y, Lu K, Piao X, Song Y, Wang L, Zhou R, Gao P, Khong HY.
    Journal: Food Chem; 2023 May 01; 407():135157. PubMed ID: 36529012.
    Abstract:
    Surimi products have unsatisfactory gel properties. Hence, this study evaluates the effect of collagen-adding on surimi gel properties and provides the first observation results regarding collagen type influence. With higher water solubility and more charged amino acids than type II, collagen type I intertwines with surimi myofibrillar proteins better to induce higher exposure of protein functional domains, more sufficient conformational changes of myosin and greater formation of chemical forces among proteins. These enhancements accelerate the gelation rate, leading to a well-stabilized surimi gel. The collagen I-containing surimi gels show more compact structures with uniformly distributed smaller pores than those containing collagen II, thereby providing the final products with higher water holding capacity and better textural profiles. As such, the surimi gel fortification performance of collagen I and the well-elucidated collagen-myofibrillar protein interaction mechanism will guide the further exploitation of collagen as an effective additive in the food industry.
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