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GABAA and GABAC receptors in freshly dissociated C57 mouse cones. A, Current responses to voltage steps in an isolated cone voltage-clamped at −70 mV and stepped in 20 mV increments from −120 to +40 mV.B, GABA-elicited response in the same freshly dissociated cone in the presence of GABAA receptor antagonist SR95531 alone and with TPMPA, respectively (GABA puff 1 mm, 1 sec). C, Maximum amplitude of the GABA responses in the absence or presence of SR95531 (100 μm) and TPMPA (50 μm).
