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Table 4 Antioxidant and ACE inhibitory activities for the enzymatic hydrolysates of PBB

From: Antioxidant and angiotensin I-converting enzyme inhibitory activities of northern shrimp (Pandalus borealis) by-products hydrolysate by enzymatic hydrolysis

Sample ABTS+scavenging activity
IC50 (mg/mL)1
SOD-like activity
IC50 (mg/mL)
Reducing power
EC50 (mg/mL)2
ACE inhibitory activity
IC50 (mg/mL)
Alcalase 0.16 ± 0.023, c 2.82 ± 0.72a 9.42 ± 0.82a 0.11 ± 0.01b
Protamex 0.17 ± 0.00b, c 2.04 ± 0.15a 6.75 ± 0.94b 0.08 ± 0.00c
Flavourzyme 0.20 ± 0.00a, b 3.13 ± 0.51a 4.63 ± 0.15c 0.11 ± 0.00b
Papain 0.21 ± 0.03a 2.59 ± 0.48a 4.46 ± 0.31c 0.11 ± 0.01b
Trypsin 0.22 ± 0.02a 2.44 ± 0.13a 6.62 ± 0.06b 0.13 ± 0.00a
L-Ascorbic acidA 0.004 ± 0.000d 0.02 ± 0.00b 0.04 ± 0.00d  
CaptoprilB     0.00002 ± 0.00000d
  1. 1IC50 (50 % inhibitory concentration) values of ABTS+ scavenging, SOD-like, and ACE inhibitory activities were expressed as a mean ± SD
  2. 2The reducing power was expressed as an EC50 (concentration of the 0.5 absorbance) value
  3. 3Means within the same row with different superscripts are significantly different by Duncan’s multiple range test (P < 0.05)
  4. A l-ascorbic acid was used as a positive control of ABTS+ radical scavenging and SOD-like activities and reducing power
  5. BCaptopril was used as a positive control of ACE inhibitory activity