This time they took a kiwi - fruit allergen called thaumatin - like protein ? which they knew would degrade quickly in the stomach by itself ? mixed it with pectin and exposed it to synthetic stomach conditions 这次,他们取一种称作索马丁样蛋白的猕猴植物过敏原(研究人员知道过敏原本身在胃中会很快被分解) ,并将其与果胶混合在一起加入到人工合成的胃内容物之中。