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Single-channel current records of a BK channel in a POPE/POPS/SPM (3.1:1:1, w/w) bilayer (A) and another in a POPE/POPS (3.1:1) bilayer (B). The current-voltage relationship of the open channels in these same recordings is shown for the POPE/POPS bilayer (•, 307 pS) and the POPE/POPS/SPM bilayer (□, 256 pS) in C. The holding voltages are indicated on each record.
