measurement of k+ and cl-diffusion potentials using 3,3-dipropylthiadicarboxocyanine iodide as a potential sensitive dye showed that both resting and stimulated vesicles developed k+ gradient-dependent potentials in the presence of an impermeant anion , but that cl- gradient-dependent potentials were observed only in the stimulated preparation .
C0021966
iodide
C0003075
anion