Representative traces of whole-oocyte currents. Currents were recorded with a two-electrode voltage clamp from whole oocytes expressing (A) WT TRPV4, (B) GOF mutant W733Q, (C) GOF mutant L596I, and (D and E) the conservative mutants L596V and L596F. (F–J) Currents from oocytes expressing LOF TRPV4 mutant L596A, L596W, L596G, L596Q, and L596K. (K) L596A currents after the application of 1 μM GSK (note current scale change). All oocytes were injected with 5 ng cRNA, except those marked.