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Loss of TREK‐1 expression reduces background K+ current. A and B, Representative current traces of background TREK‐1–like K+ current and summary data of the current amplitude at +30 mV (end of ramp protocol) in WT, Kcnk2 −/−, and qv 4J sinoatrial node cells (n=6 from 4 preparations for WT, n=8 from 5 preparations for Kcnk2 −/− and qv 4J, *P<0.05 vs WT). Voltage ramp protocol is shown in inset. WT indicates wild type.
