RNA-binding protein implicated in the regulation of several post-transcriptional events. May be involved in mRNA translation repression and stability. Mediates exon inclusion in TNNT2 pre-mRNA. Shuttles between the nucleus and the cytoplasm in a CRM1-dependent manner. Expressed in heart. Expressed in heart at embryonic day 12 and 14 (at protein level). Expressed in heart at embryonic day 8. Belongs to the CELF/BRUNOL family.