TABLE 1.

Endopeptidase activities of Lactobacillus helveticus CNRZ32 and a CNRZ32 pepO mutant

Strain	Endopeptidase activity on substrate of:
	N-benzoyl-Phe-Val-Arg-pNA		N-benzoyl-Pro-Phe-Arg-pNA		N-benzoyl-Val-Gly-Arg-pNA
	Means ± SDa	RA (%)b	Mean ± SD	RA (%)	Mean ± SD	RA (%)
CNRZ32	0.39 ± 0.01	100	0.081 ± 0.001	100	0.085 ± 0.004	100
CNRZ32 pepO	0.083 ± 0.001	21	0.081 ± 0.003	100	BQLc	<6

^aMean of specific activity (micromoles of pNA minute⁻¹ milligram of protein⁻¹) ± standard deviation. 

^bRA, relative activity. 

^cBQL, below quantifiable level (0.01 μmol of pNA min⁻¹ mg of protein⁻¹).