Protein expression of CAPS1 and PCNA was detected by Western blotting, as previously described [24 (link)]. Briefly, cells were lysed using radioimmunoprecipitation assay (RIPA) buffer and subjected to immunoblotting using anti-CAPS1 (PRS4561; Sigma-Aldrich, St. Louis, MO, USA), anti-PCNA (AB92552; Abcam, Cambridge, UK), and anti-GAPDH (AB181603; Abcam) antibodies. Proteins were visualized using an enhanced chemiluminescence kit (Pierce, Brookline, MA, USA).
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