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Identification and Characterization of Antioxidant Peptides from Enzymatic Hydrolysates of Duck Meat

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journal contribution
posted on 08.04.2015, 00:00 by Lu-Sha Wang, Ji-Chao Huang, Yu-Lian Chen, Ming Huang, Guang-Hong Zhou
The objective of this study was to prepare antioxidant peptides from duck meat hydrolysate (DMH) using Protamex. The DPPH scavenging activity, hydroxyl radical (OH) scavenging activity, and Fe2+-chelating ability of DMH were investigated. DMH was separated into three groups, MWCO-1 (69.57%), MWCO-2 (9.53%), and MWCO-3 (8.21%), by ultrafiltration. MWCO-3 exhibited the highest DPPH scavenging activity (83.17 ± 0.73%) and was subsequently fractionated by using gel filtration chromatography to obtain fraction B (40.90%). Fraction B5 (6.71%) obtained from ion exchange chromatography exhibited the highest DPPH scavenging activity (93.63 ± 0.13%) and contained seven peptides which were characterized by LC–MS/MS. Among these peptides, LQAEVEE­LRAALE showed the highest DPPH scavenging activity (93.36 ± 0.53%) and Fe2+-chelating ability (87.13 ± 0.47%) and IEDPFDQD­DWGAWKK exhibited the highest OH scavenging activity (46.51 ± 0.16%). The results presented here indicated that DMH could serve as a suitable source of antioxidant peptides.