Add time:09/08/2019 Source:sciencedirect.com
The potentiality of a native isolate, Pediococcus acidilactici C20, to produce quantifiable amounts of pediocin C20 on whey permeate was studied. The molecular basis for the presence of a β-gal like gene was shown by DNA dot-blot technique followed by β-galactosidase (β-Gal) assay on native polyacrylamide gel as experimental evidence for lactose hydrolysis. Production of pediocin C20 was found to be 1–1.5-fold excess in lactose-based medium as compared to medium with glucose. Optimized whey permeate supplemented with 2% yeast extract gave cell growth of 3.5, OD600 and pediocin C20 activity of 150 × 103 AU ml−1 equivalent to that obtained by growth in commercial MRS broth.
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