intracellular pH?

[Jeff Cohlberg]

Can anyone direct me to literature on intracellular (cytoplasmic) pH,
particularly in neurons?  It's "common knowledge" that "physiological pH"
is around 7.4.  Where does this information come from?  Does this refer to
the serum or the intracellular environment?  To what extent has
intracellular pH actually been measured?
 -- 
Jeffrey A. Cohlberg, Professor
Department of Chemistry and Biochemistry
California State University, Long Beach
1250 Bellflower Boulevard, Long Beach, CA 90840
Phone: (310) 985-4944	FAX: (310) 985-8557   E-mail: cohlberg at csulb.edu