为探讨大豆蛋白与面筋蛋白的相互作用,将大豆分离蛋白(soy protein isolate,SPI)、水解大豆蛋白(soy protein hydrolyzate,SPH)和质构化大豆蛋白(texturized soy protein,TSP)分别添加到谷朊粉中,分析大豆蛋白不同的处理方式和比例对面筋特性的影响。结果表明,添加SPI后面筋蛋白中的面筋醇溶蛋白含量减小,麦谷蛋白大聚体(glutenin macropolymers,GMP)含量增加,从而引起面筋的拉伸距离减小,最大拉伸阻力增大。添加SPI后面筋的储能模量(G′)与损耗模量(G″)均呈现增大趋势,与添加TSP后干面筋含量变化相反。添加SPH后面筋蛋白中GMP含量明显减小,使得干湿面筋含量、拉伸特性以及G′与G″均明显减小。综上,大豆蛋白与面筋蛋白相互作用,引起面筋中蛋白组分及面筋网络结构变化,诱导其面筋特性的变化。
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