Figure 2.

In vitro renin and angiotensin-I-converting enzyme (ACE-I) inhibitory activities of crude protein, full hydrolysate (FH) and ultra-filtered hydrolysates (1, 3 and 10 kDa-UFH) generated from Ulva sp. The samples and positive controls (the renin inhibitor Z-Arg-Arg-Pro-Phe-His-Sta-Ile-His-Lys-(Boc)-OMe and the ACE-I inhibitor captopril) were assayed at 1 mg/mL. The results are expressed as mean ± standard deviation of the mean (SEM). The different letters in the figure indicate statistical significant differences (P < 0.05) between the different samples tested.