Abstract:
The optimum conditions for protease activity of 3 proteases were investigated. Alcalase 2.4L showed optimum activity at pH 8 and temperature of 50 0C. Allzyme FPD and Bromelain showed optimum pH and temperature at 6 and 50 0C. Three proteases were screened for an efficient enzyme for porcine blood protein hydrolysis. The result showed that Alcalase 2.4L was the most effective as
it gave the highest degree of hydrolysis (43.49%) and free amino acids release (4.19 mg/ml). Optimum conditions for porcine blood hydrolysis including substrate concentrations, enzyme concentrations and hydrolysis time were studied using Alcalase 2.4L. The result showed that at 2%porcine blood protein, 30 units of Alcalase 2.4L and 8 hours of hydrolysis time gave the maximum degree of hydrolysis of 48.15%. The porcine blood hydrolysate was further tested for antibacterial and antioxidant activities. It had a narrow spectrum of activity against Grampositive bacteria,including Bacillus cereus TISTR 008, B. pumilus TISTR 908 and Staphylococcus aureus TISTR 118. Furthermore, porcine blood hydrolysate had an antioxidant activity (94.65%) comparable to that of BHA (84.33%) and BHT (89.52 %) at 0.02 % concentration.