Table 1. The yield of tuna byproducts with different proteases

Hydrolysates	Yields of protein hydrolysates (%)¹⁾
No enzyme	3.15±0.00^e2)
Alcalase	15.15±0.01^a
Bromelain	14.48±0.03^ab
Flavourzyme	8.87±0.00^c
Neutrase	12.13±0.01^b
Papain	4.70±0.00^d

Yields (%) = [Total solid content of protein hydrolysate − total solid content of blank (without substrate)] / total substrate content × 100.
Each value is mean±SD (n=3) and different superscripts (a-e) are significantly different at p<0.05 by Duncan’s multiple range test.