Fig. 4
Statistical analysis shows amine responses significantly different from ATP responses. Calcium responses were measured for cells responding to the amine-mix (103 cells) and to ATP (269 cells). No overlap in cell populations was seen. Additionally, responses to high K+ (225 cells) were measured at the end of an experiment. Three kinetic parameters were quantified: Onset time, measured from onset of response to 50% of maximal peak height (