chloride gradient-stimulated so4 uptake was markedly reduced by inhibitors of anion exchange ( 4,4'-diisothiocyanatostilbene-2,2'-disulfonic acid , 4-acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid ) and was saturable ( so4 km = 0.302 +/- 0.064 mm ; vmax = 1.59 +/- 0.22 nmol so4 . mg protein-1 . min-1 ) .
C0008203
chloride
C0003075
anion