In total, 36 971 phosphosites corresponding to 23 802 phosphopeptides were confidently detected (probability >0.75) in 120 filtered tissue samples (BrM, n = 60; BrM‐NAT, n = 23; Glioma, n = 54; Glioma‐NAT, n = 11) (Figure 1F; Figure S3E, Supporting Information). Here, BRD2 is linked to central nervous system cancer.