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Percent relative activity of Lactococcus lactis LM0230 derivatives expressing Lactobacillus helveticus CNRZ32 PepO2, PepO3, or PepE toward peptides in the defined peptide mix at pH 5.2, 4% NaCl, and 10°C. (A) β-CN (f193-209); (B) αS1-CN (f1-9); (C) αS1-CN (f1-6); (D) αS1-CN (f1-13); (E) αS1-CN (f1-16). Values were corrected by subtracting the values obtained in the control treatments. Activity with αS1-CN (f1-9) was arbitrarily set to 100%.
