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 such as CELF4 play significant roles in RNA processing and the post-transcriptional regulation of gene expression. The functions of CELF4 likely involve RNA metabolism and regulation, impacting a variety of cellular processes.