To investigate the underlying molecular mechanisms through which RBMS1 regulates lung cancer metastasis, we identified the differentially expressed proteins based on previously reported quantitative proteomics data in lung cancer cells with doxycycline‐induced depletion of RBMS1.[15] Intriguingly, the protein level of S100P, a member of the S100 calcium‐binding protein family, was significantly decreased upon RBMS1 depletion (Figure 2A and Table S1, Supporting Information). Here, S100P is linked to lung cancer.