期刊
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
卷 173, 期 5, 页码 1169-1182出版社
SPRINGER
DOI: 10.1007/s12010-014-0793-6
关键词
Frog protein hydrolysates; Antioxidative peptides; Radical scavenging activity; Electrospray ionization mass spectrometry; Oxygen radical absorbance capacity
资金
- Key Technology Foundation of Guangdong Province [2011A080403019, 2012A020800002]
- National Natural Science Foundation of China [31000759, 31101222]
Frog (Hylarana guentheri) proteins were hydrolyzed by papain and Flavourzyme to obtain antioxidative peptides. The antioxidant activities of the frog protein hydrolysates (FPHs) were measured, including 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity (IC50 = 9.94 +/- 0.13 mg/mL), reducing power (0.39 +/- 0.01 at 5.0 mg/mL), and oxygen radical absorbance capacity (ORAC) value (789.15 +/- 75.10 mu mol Trolox equivalents/g). The hydrolysates were purified by ultrafiltration, ion exchange chromatography, gel filtration chromatography, and reverse-phase high-performance liquid chromatography (RP-HPLC). Through analysis of ESI-MS/MS, two dipeptides were identified as Leu/Ile-Lys (259.1607 Da) and Phe-Lys (293.1446 Da), respectively.
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