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http://dx.doi.org/10.3746/jkfn.2010.39.1.008

Effect of Angiotensin-I Converting Enzyme Inhibitory from Hydrolysate of Soybean Protein Isolate  

Back, Su-Yeon (Korea Food Research Institute)
Do, Jeong-Ryong (Korea Food Research Institute)
Do, Gun-Pyo (Korea Food Research Institute)
Kim, Hyun-Ku (Korea Food Research Institute)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.39, no.1, 2010 , pp. 8-13 More about this Journal
Abstract
The angiotensin converting enzyme (ACE) inhibition effect of soybean protein isolate hydrolysate was studied using protease. Soybean protein isolate was hydrolysed by seven enzymes (Alcalase 2.4 L, Flavourzyme 500 MG, GC 106, Multifect Neutral, Neutrase 0.8 L, Papain 30,000 and Protamex), enzyme concentrations (0, 0.5, 1.0 and 1.5%), at various hydrolysis times (0, 1, 2, 3, 4, 5 and 6 hr) and suspension concentrations (1, 5, 7, 10 and 15%). Absorbance at 280 nm, brix and ACE inhibitory activity of soybean protein isolate hydrolysates were investigated. Absorbance at 280 nm and brix of Alcalase 2.4 L treatment were higher than other enzyme treatments. The optimum condition of hydrolysis was Alcalase 2.4 L, 1% enzyme concentration, 5% suspension concentration for 4 hr. $IC_{50}$ value of ACE inhibitory activity of soybean protein isolate hydrolysate was $79.94 {\mu}g/mL$. These results suggest that soybean isolate protein hydrolysate from Alcalase 2.4 L may be of benefit for developing antihypertensive therapeutics.
Keywords
soybean protein isolate; hydrolysate; angiotensin converting enzyme (ACE) inhibitory activity;
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