Figure 4.Short circuit current in isolated mouse colonic mucosae in an Ussing-chamber setup. Control conditions (A): stimulation with dB-cAMP. Stimulation with dB-cAMP in the presence of 0.5 mM bumetanide (B), 100 μM of the NBCinhibitor S 0859 (C), and S 0859 + bumetanide + acetazolamide (D).