the affinity of the external translocation site of the carrier for each of the different anions was determined ( i ) from substrate competition between cl- and either br- , f- , or i- , ( ii ) from trans stimulation of 36cl- efflux as a function of the external concentrations of these anions , ( iii ) from changes in the apparent ki for chc depending on the nature of the replacement anion in the bathing medium , and ( iv ) from activation of 82br- and 125i- influxes by their respective ions .
C0016327
f
C0003075
anion