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Table 5 Antioxidant and ACE inhibitory activities for the molecular weight cut-off fractions of the protamex hydrolysate

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

Sample ABTS+ scavenging activity SOD-like activity Reducing power ACE inhibitory activity
IC50 (mg/mL)1 IC50 (mg/mL) EC50 (mg/mL)2 IC50 (mg/mL)
< 3 K 0.22 ± 0.013, b >10 20.14 ± 0.39a 0.06 ± 0.00a
3–10 K 0.22 ± 0.00b >10 13.84 ± 0.16b 0.03 ± 0.00b
> 10 K 0.24 ± 0.01a >10 7.04 ± 0.83c 0.03 ± 0.00b
l-Ascorbic acidA 0.005 ± 0.000c 0.07 ± 0.00d 0.04 ± 0.00d  
CaptoprilB     0.00001 ± 0.0000c
  1. Antioxidant and ACE inhibitory activities were measured using the molecular weight cut-off fractions of the protamex hydrolysate
  2. 1IC50 values of ABTS+ scavenging, SOD-like, and ACE inhibitory activities were expressed as a mean ± SD
  3. 2The reducing power was expressed as an EC50 value
  4. 3Means within the same row with different superscripts are significantly different by Duncan’s multiple range test (P < 0.05)
  5. A l-ascorbic acid was used as a positive control of ABTS+ radical scavenging and SOD-like activities, and reducing power
  6. BCaptopril was used as a positive control of ACE inhibitory activity