Fig. 9. Anionic dyes do not impact on glibenclamide inhibition of fluid secretion. Classical secretion assays were performed in normal medium or with the addition of phenol red (2x10^-5 mol l^-1) or amaranth (2x10^-5 mol l^-1). Glibenclamide (final concentration 10^-4 mol l^-1) was added after 30 min. Secretion rates are shown as means ± S.E.M. (N=6).