Total protein was extracted and the target protein was detected as described previously.33 For immunoprecipitation (IP), the lysate was precleared by protein A/G‐agarose, and IP was carried out by incubating the supernatants with antibodies against NCAPH or β‐catenin and protein A/G‐agarose overnight at 4°C. After centrifugation, the complexes were washed and resuspended. The targeting proteins were detected by Western blotting. Rabbit IgG isotype was used as a negative control. All antibody information was listed as follows: NCAPH (PA5‐80842, Invitrogen), β‐actin (ab8226, Abcam), FOXP3 (ab215206, Abcam), FUS (PA5‐52610, Invitrogen), METTL3 (ab195352, Abcam), YTHDC1 (ab259990, Abcam), IGF2BP1 (ab184305, Abcam), IGF2BP2 (ab248279, Abcam), IGF2BP3 (ab248279, Abcam), β‐catenin (ab6301, Abcam), PD‐L1 (ab213480, Abcam), Granzyme‐B (MA1‐80734, Invitrogen), Perforin (14‐9993‐82, Invitrogen).
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