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Distribution of peptides characterized by angiotensin-converting enzyme (ACE) inhibitory IC50 values lower than 300 µmol/L along with principal components 1 (PC1) and 2 (PC2). IC50 represent the concentration of peptide able to inhibit the enzymatic activity by 50%. Yellow diamonds represent LL class samples, red diamonds represent HH class samples, green circle represents the biological activity (ACE-inhibition), and blue triangles represent the bioactive peptides.
