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. 2003 Apr;121(4):261–276. doi: 10.1085/jgp.200208771

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Copyright © 2003, The Rockefeller University Press

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Figure 11. — Block of the wild-type and a mutant IRK1 by quaternary ammoniums. Currents of the wild-type and an IRK1 construct containing ROMK1's M2 sequence recorded in the absence (A, E) and presence of tetramethylammonium (TMA; B and F), tetraethylammonium (TEA; C and G), or tetrapropylammonium (TPrA; D and H).