Glutamate-induced Ca²⁺ transients are significantly larger than DHPG-induced Ca²⁺ transients.

<p>(A) Cells were treated with both DHPG (50 µM) and glutamate (30 µM). (B) Bar graphs summarizing the average amplitudes of DHPG- and glutamate-induced Ca²⁺ transients from 74 cells. Scale bars indicate 10 sec (horizontal) and 50 nM (vertical). Glu = glutamate. ** indicates <i>p</i><0.01.