Co-immunoprecipitation assay and western blotting (WB) were performed as previously described45 (link). Lysates were prepared from HuH-7 cells transfected with plasmids of interest 48 hr after transfection. The antibodies used in co-immunoprecipitation were anti-Cx43 antibody (Sigma), anti-T7-tag antibody (Novagen), anti-HA-tag antibody, anti-DYKDDDDK (FLAG)-tag antibody (Wako Pure Chemical), and normal mouse and normal rabbit IgG (Santa Cruz Biotechnology). The antibodies used in WB were anti-Cx43 antibody (Sigma), anti-Hsc70 antibody (StressMarq), anti-T7-tag antibody (Novagen), anti-HA-tag antibody, anti-DYKDDDDK (FLAG)-tag antibody, anti-cMyc-tag antibody (Wako Pure Chemical), and anti-GAPDH antibody (Santa Cruz Biotechnology). The signals were measured by Image Quant LAS500 (GE Healthcare UK Ltd., Buckinghamshire, England).
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