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. 2003 Mar 28;549(Pt 1):107–120. doi: 10.1113/jphysiol.2002.038646

Figure 1. External TEA protection from block by internal TBSb depends on internal K+.

Figure 1

A, fraction of current (at 0 mV) blocked by internal TBSb in 135 mm internal K+ in the absence (□) and presence (•) of 100 mm external TEA. Mean values with s.e.m. limits from 4–6 measurements at each TBSb concentration in the absence and 3–7 measurements at each TBSb concentration in the presence of external TEA. B, similar data obtained in 20 mm internal K+; s.e.m. limits omitted if smaller than the symbol. Insets: raw current records from 80 ms voltage clamp steps from −70 to 0 mV in the absence (left) and presence (right) of 100 mm external TEA. Lower current record in each panel obtained with 5 μm internal TBSb. Apparent Kd values for internal TBSb block are indicated and described in text.