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Effects of EGTA on B21-B8 synaptic transmission. A: B21 was peripherally activated and centrally depolarized so that a PSP was evoked in B8 (control). Ten minutes after injection of EGTA into B21 via a glass capillary filled with 250 mM EGTA, the amplitude of the B8 PSP size was dramatically reduced. B: group data for the type of experiment shown in A. Note that EGTA produced a significant decrease in PSP amplitude.
