Effect of low pH on thiomethyl-beta-D-galactoside uptake by Streptococcus lactis.
Maximal beta-galactosidase activity in Streptococcus lactis was obtained at pH 7, but the maximal rate of thiomethyl-beta-d-galactoside uptake was observed at pH 3.6 to 4. It is concluded that the decrease in beta-galactosidase activity in intact cells at lowered pH is not due to diminished transport of beta-galactoside.
D006027:Glycosides / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D013291:Streptococcus / Q000378:metabolism*
D006027:Glycosides