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The effect of selective calcium channel antagonists on depolarization-induced TH expression. Dissociated E16.5 PG neurons were cultured for 2 d and subsequently exposed (KCl) or not exposed (Control) to 40 mm KCl in the presence or absence of either ω-conotoxin (1 μm) or nimodipine (2 μm) for 24 hr. Each barindicates the percentage (± SEM) of neurons exhibiting TH immunoreactivity; n.s., not significantly different; ANOVA followed by Scheffé’s test.
