Q: How to maintain pH to culture Streptoccus mutans GS-5?

[Jinling Xie]

Hi, there,

    I'm trying to maitain the pH value at 7.0 and 5.5 to culture
S.mutans GS-5. I used PBS buffer. But it doesn't work. After o/n,
the pH value drops down too much. Anybody out there knows which
buffer I should use, please reply to this account. Your information
would be appreciated.


Jinling Xie

P.S.: post for a friend.