Figure 3.

Influence of complete replacement of sodium by different cations on the 5-HT (2-min exposure)-evoked [¹⁴C]-guanidinium influx above basal influx in N1E-115 cells. The responses are expressed as percentages of the effect elicited by 100 μM 5-HT in choline buffer (=reference effect); 100% corresponds to 51 pmol × mg protein⁻¹). Shown are means of n=5–12 experiments. Error bars were omitted for the sake of clarity; they were in the range of values shown in Figure 2.