Table 3. Antibacterial activity of casein hydrolysate fractions with Protamex®
Sample | Degree of inhibition of fractions1) | S. enterica |
B. cereus | E. coli | S. aureus |
PC | + |
CPP | + | ++ | ++ | + |
F3 | ++ | +++ | +++ | ++ |
F4 | +++ | ++ | ++ | ++ |
F5 | ++ | +++ | ++ | + |
F6 | ++ | ++ | + | ++ |
F7 | ++ | ++ | ++ | ++ |
All samples protein concentration were 200 μg/mL.
All values were mean±SD of triplicates.
The diameters of the clear zone of inhibition were as follows: +, 1.0≤diameter≤1.5; ++, 1.5≤diameter≤2.0; +++, diameter>2.0.
PC, positive control (0.25 N HCl); CPP, casein phosphopeptide.