rabbit jejunal brush-border membrane vesicles were used in our experiments so that membrane potential differences can be calculated from the goldman-hodgkin-katz equation with the relative ion permeabilities recently reported for this preparation ( gunther , r.d. , schell , r.e . and wright , e.m. ( 1984 ) j. membrane biol . 78 , 119-127 ) or approximated by the nernst potential for the anion .
C0022023
ion
C0003075
anion