本文选用低值鱼蛋白进行酰化改性，研究其改性程度与酶解特性（酶解物氨态氮得率，TCA可溶性肽得率及肽分子量分布）间的关系。结果表明：酰化鱼蛋白导致氨态氮得率下降，但有利于TCA可溶性氮得率的提高。最终得到60 ℃/30 min热处理后0.3 g SA/g Pro改性的鱼蛋白酶解10 h，TCA可溶性肽得率最高达38%。

Low-cost fish protein was acylated, and then the effect of the acylation degree on the enzymatic hydrolysis of the acylated fish protein, including yield of amino acids and TCA-soluble peptide, and molecular weight distribution of peptide, was studied in this paper. Results showed that acylation significantly reduced the yield of amino acids, but improved the TCA-soluble peptides in the hydrolysates of the fish protein. For the acylation of fish protein, the best pre-incubation temperature and time and the dosage of the acylating reagent SA were 60 ℃, 30 min, and 0.3 g/g Pro, respectively, under which the highest yield of TCA soluble peptide reached 38% after hydrolyzing the fish protein for 10 h.

广东省自然科学基金资助项目（031348）；广东省农业重大攻关项目（A20302）；广东省科技计划项目（2004A20302003）