1: C=standard protein; 2: Protein before hydrolysis; 3: Hydrolysate by alcalase after 1 hour hydrolysis; 4: Hydrolysate by alcalase after 2 hours hydrolysis; 5: Hydrolysate by alcalase after 3 hours hydrolysis; 6: Hydrolysate by alcalase after 4 hours hydrolysis; 7: Hydrolysate by thermolysinafter 1 hour hydrolysis; 8: Hydrolysate by thermolysinafter 2 hours hydrolysis; 9: Hydrolysate by thermolysinafter 3 hours hydrolysis; 10: Hydrolysate by thermolysinafter 4 hours hydrolysis.

Figure 2: Analysis of molecular weight distribution for O. niloticus protein and protein hydrolysates