Figure 4.

(A) Representative trace of Ca²⁺ changes in tsA‐201 cells (n = 572) elicited by the application of ATP (5 $\mu$M) and trypsin (100 nM). (B) Average pharmacologically stimulated Ca²⁺ increases above the baseline levels in tsA‐201 cells. (C) Representative trace of Ca²⁺ increase in hippocampal neurons (n = 388) through the application of glutamate (20 $\mu$M) and KCl (20 mM). (D) Average Ca²⁺ increases above resting levels in hippocampal neurons for each stimulus.