Fig. 7. Inhibition of secretion (stimulated with 50 nmol l1 5-HT)
with increasing doses of Fraction 25 from RP-HPLC. Values are expressed as a
percentage of control (normal secretion of tubules stimulated with 50 nmol
l1 5-HT). Values are mean ± s.e.m., N=8 or
more tubules. *Statistically significant inhibition (P<0.001).