Cells cultured in 96-well plates were fixed with methanol, stained with the Duolink (Sigma) PLA protocol according to manufacturer's directions using Mcl-1 (Santa Cruz, 1:25) and Bim (Santa Cruz, 1:25) antibodies, counterstained with Hoescht and scanned by ImageXpress Micro XL Automated Microscope. PLA fluorescent puncta and Hoescht-stained cells were enumerated using ImageJ software.
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