Abstract：
:Watermelon seed, a watermelon processing industry by-product, is a good protein source for the preparation of antioxidant peptides due to its high protein content, low cost, special amino acid composition. Antioxidant hydrolysates obtained from watermelon seed protein (WSP) after slit divergent ultrasound (SDU) treatment were studied. The stepwise multiple linear regression model verified that the reducing power of watermelon seed protein hydrolysates (WSPHs) is positively related with -SH and β-turn content of WSP (R2 = 0.931, p < 0.01). Using the degree of hydrolysis (DH) and reducing power as indicators, the WSPHs was prepared under the optimal conditions (ultrasound frequency: 20/28 kHz, time: 60 min, power density: 100 W/L) and divided into three components by ultrafiltration membrane (1 and 5 kDa). Compared with WSPHs and other fractions, WSPHs-I (Mw < 1 kDa) not only significantly protected HepG2 cells from H2O2-induced damage, but also greatly alleviated the liver injury caused by d-galactose in male SD rats.
journal_name
Food Chemjournal_title
Food chemistryauthors
Wen C,Zhang J,Zhou J,Feng Y,Duan Y,Zhang H,Ma Hdoi
10.1016/j.foodchem.2020.127135subject
Has Abstractpub_date
2020-10-30 00:00:00pages
127135eissn
0308-8146issn
1873-7072pii
S0308-8146(20)30997-3journal_volume
328pub_type
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