CELF4 (CUGBP, Elav-Like Family Member 4): CELF4 is a gene that encodes an RNA-binding protein belonging to the CUGBP/Elav-like family. Proteins like CELF4 play important roles in RNA processing and the post-transcriptional regulation of gene expression. CELF4’s functions likely involve RNA metabolism and regulation, affecting a range of cellular processes.