TIP5 interacts with TCF7L24. (A) A GST pull-down assay was performed to examine the interaction between GST-TCF7L24 fusion protein and endogenously expressed TIP5 in 7404 cells. (B) An immunoprecipitation assay was performed to examine the interaction between exogenously expressed TIP5 (myc-TIP5) and TCF7L24 (Flag-TCF7L24) in 7404 cells. (C) An immunoprecipitation assay was performed to examine the interaction between endogenously expressed TIP5 and TCF7L24 in 7404 cells. (D) A topflash reporter assay was performed in 7404 cells. (E) An immunoprecipitation assay was performed to examine the effects of TIP5 on the interaction between exogenously expressed β-catenin (HA-β-catenin) and TCF7L24 (Flag-TCF7L24) in 7404 cells. Data are presented as the mean ± standard deviation. sh, small hairpin; GST, glutathione S-transferase; TCF7L24, Transcription factor 4; TIP5, transcription termination factor-1 interacting protein 5; con, control; IP, immunoprecipitation; HA, hemagglutinin tag; input, cell lysate. ##P<0.01, **P<0.01 vs. the respective sh con group.