Dissimilar effects of Na+ and K+ on the promotion of glucosyltransferase secretion in Streptococcus salivarius.


A defined growth medium (designated AP11), in which the concentrations of Na+ and K+ could be altered independently of one another, was developed for Streptococcus salivarius ATCC 25975. The addition of 100 mM-Na+ to AP11-medium containing 25 mM-K+ initially reduced the rate of expression of extracellular glucosyltransferase (GTFe). However, once S… (More)


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