We incubated the whole‐cell lysates (2 mg) from the cultured cells overnight in IP buffer with 25 μL of protein A/G magnetic beads and the corresponding antibodies against RAB3C (Cat # 15029‐1‐AP, Proteintech, Rosemont, IL, USA) or dystrophin (Cat # HPA023885, Atlas antibodies, Bromma, Sweden) in a 1.5‐mL microcentrifuge tube with a final volume of 1000 μL. We purified the proteins that interacted with the antibodies according to the manufacturer's protocol [38 (link)].
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