高等学校化学研究 ›› 2010, Vol. 26 ›› Issue (5): 712-716.
LIU Jing-bo1, YU Zhi-peng1, ZHAO Wen-zhu1, LU Jing1, CHEN Feng2 and LIN Song-yi1*
LIU Jing-bo1, YU Zhi-peng1, ZHAO Wen-zhu1, LU Jing1, CHEN Feng2 and LIN Song-yi1*
摘要: A rapid, simple and interference-free method was developed to evaluate the inhibitory activity of hydrolyzed peptides from egg white protein against the angiotensin-converting enzyme. The total reaction volume was 60 μL, saving the cost. The assay was based on a HPLC separation and quantification of the synthetic substrate hippuryl-L-histidyl-L-leucine and its hydrolyzed product―hippuric acid; the separation was performed on a C18 column eluted by a mobile phase of acetonitrile/water(0.5% TFA) at a volume ratio of 25:75. At a signal to noise ratio(S/N) of 10, the detective limit of the quantitation of hippuric acid was (0.4600±0.0097) μmol/L. The standard curve shows a linear response with a slope of 49488 and a correlation coefficient of 0.9995. The assay was adequate for the study of ACE inhibition by Captopril and peptides derived from food protein, and showed a very good correlation with the previous methods.