Abstract
Maximal β-galactosidase activity in Streptococcus lactis was obtained at pH 7, but the maximal rate of thiomethyl-β-d-galactoside uptake was observed at pH 3.6 to 4. It is concluded that the decrease in β-galactosidase activity in intact cells at lowered pH is not due to diminished transport of β-galactoside.
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Selected References
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