View article

We have investigated the antioxidative activity of five hydrolysates from smooth hound (Mustelus mustelus) meat obtained by various gastrointestinal proteases: crude enzyme extract, low molecular weight (LMW) alkaline protease and trypsin-like protease from M. mustelus intestine, pepsin from M. mustelus stomach, and bovine trypsin. The antioxidant activities of the different smooth hound protein hydrolysates (SHPHs) were evaluated using various in vitro antioxidant assays, such as 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging activity, reducing power, total antioxidant capacity, lipid peroxidation inhibition in rat liver homogenate and β-carotene bleaching assay. The five hydrolysates showed different degrees of hydrolysis and varying degrees of antioxidant activity. The hydrolysate produced by the LMW protease generally showed a greater antioxidative activity as indicated by all the methods …