Enzymatic modification is an effective way to improve soy protein’s functionality. Past enzymic modification research focused on effects of reaction conditions. In this paper,“trasition state SPI”which means partly denatured proteins were made and hydrolyzed. We tried to find out substrate’s effect on enzyme hydrolysis and choose the appropriate SPI for reaction. On the basis of these results, we could optimize the right technologic conditions with a view of functionality of the product.
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