May play a role in cell death control. Acts as a transcriptional repressor. Has been shown to repress transcription of SRF in vitro and so may play a role in heart development. Interacts with XIAP. Some staining in the cytosol. In the embryo, widely expressed with highest levels in brain. In the adult, highest expression is found in the heart. The C-terminal region mediates transcriptional repression. Belongs to the TCF25 family.