Table 3. Hydrogen peroxide radical scavenging activities of tuna byproducts with different proteases

Hydrolysates	RC50 (μg/mL)1)	TEAC (μg TE/mg)2)
No enzyme	315.54±5.24e3)	13.75±0.08e
Alcalase	116.38±1.81c	39.48±0.15b
Bromelain	109.89±2.09bc	36.26±2.84c
Flavourzyme	65.96±0.99a	61.81±0.62a
Neutrase	107.50±5.30b	38.76±2.21bc
Papain	159.67±5.27d	28.81±1.96d
Trolox	5.06±0.03

Concentration required for 50% reduction of H₂O₂ at 10 min after starting the reaction.
Trolox equivalent antioxidant capacity.
Each value is mean±SD (n≥3). Different superscripts (a-e) in the same column are significantly different at p<0.05 by Duncan’s multiple range test.