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Top right. Large SMI-32(+) neurons show substantial [Ca2+]ielevations during low-level kainate exposures. A, Pseudocolor image of a culture field showing [Ca2+]i levels in individual neurons 8 min after the addition of kainate (10 μm). B, Photomicrograph of the same field after development of the SMI-32 stain. Note that the large SMI-32(+) neuron had one of the highest [Ca2+]i levels. Scale bar, 100 μm.
