Assays were performed in HEK293 cells for B) wt-CFTR. For the wildtype measurements, we compared the maximum Fsk response (Maximum F /F0; where F0 represents baseline RFU right before the stimulation). For each of wt-CFTR data for three proteins not detected as interactors (first three bars following CFTR only) are shown as negative controls. Fluorescence signals were normalized to the CFTR-only control and the statistical significance of differences assed by unpaired t-test (*p<0.05, **p<0.01 and ***p<0.001). Samples run in n=3 replicates, and all values are mean ± s.d. 