PTBP3 and cancer: Spearman correlation analysis on the pan-cancer dataset from cBioPortal yielded 926 mRNAs co-expressed with PTBP1, 657 mRNAs co-expressed with PTBP2, and 874 mRNAs co-expressed with PTBP3 (|R| ≥ 0.4, p < 0.05) (Supplementary Table S8).