Anti-Flag antibody, anti-Myc antibody and anti-HA antibody-conjugated agarose beads were purchased from Sigma-Aldrich. The experimental procedures including Western blot and coimmunoprecipitation analysis have been described previously [79 (link)]. The Fuji Film LAS4000 mini luminescent image analyzer was used for photographing the blots. Multigauge V3.0 was used for quantifying the protein levels based on the band density obtained in the Western blot analysis.
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