The immunofluorescence staining images were obtained as previously described [15]. The transfected HEK293T cells was probed by CaV1.2α1C antibody (Alomone Labs), and imaged with a Leica TCS SP5 confocal laser scanning microscopy (Leica Microsystems, Heidelberg, Germany). The detailed methods for immunofluorescence staining are given in the supplementary information S1 File.
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