POU2F3 and small cell lung carcinoma: Further, Rapid Immunoprecipitation Mass Spectrometry of Endogenous Proteins (RIME) analysis of POU2F3 and its coactivators’ interactome revealed multiple key mSWI/SNF components coimmunoprecipitated with POU2F3 and its coactivators (Fig. 2D, Fig. S4B–E, Supplementary Table 1), affirming the physical interaction between the POU2F3 complex and the mSWI/SNF complex in SCLC-P cells.