Proteins from the cell lysates were prepared from cell lines as previously described [16 (link)]. Equal amounts of protein were denatured and separated by SDS-PAGE, transferred onto PVDF membranes, and incubated with polyclonal antibodies to TMEM16A (Abcam, ab53212; 1:100) and mouse β-actin antibody (Cell Signalling; 1:500). The peak intensity of each band was visualized using an Enhanced Chemiluminescence kit (Amersham, Little Chalfont, UK) on X-ray film (Millipore Corporation, Billerica, USA).
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