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Transporter current expression in different types of astrocytes. A-C, Whole-cell voltage-clamp recordings of an intermediate astrocyte from the VRG during application of 1 mm d-aspartate. TTX (500 nm), CdCl2 (100 μm), and CNQX (50 μm) were added to prevent indirect effects by neighboring neurons. D, Amplitudes of current responses to 1 mm d-aspartate in the three types of astrocytes (data are given as mean ± SE).
