Figure 6.

TMEM16B mutations. (A) Predicted topology of TMEM16A and TMEM16B from hydropathy analysis. (B) Alignment between mouse TMEM16A (a,c; available from GenBank/EMBL/DDBJ under accession no. NM_178642.4) and the retinal isoform of TMEM16B used in this study (NP_705817.1), with the mutations or deletions highlighted in color. (C–F) Representative recordings at the indicated [Ca2+]i for E367Q (C), ΔE5 (D), ΔEYE (E) mutants, and WT (F). Traces for WT are the same as in Fig. 2 A. Voltage protocol as in Fig. 1 A. (G) I-V steady-state relations (n = 3–8). (H) Average ratios between currents measured at +100 and −100 mV plotted versus [Ca2+]i for each mutant (n = 3–8).

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