The function of MEF2B (myocyte enhancer factor 2B, Ensembl gene identifier ENSG00000213999) is as follows. Transcriptional activator which binds specifically to the MEF2 element, 5'-YTA[AT](4)TAR-3', found in numerous muscle-specific genes. Activates transcription via this element. May be involved in muscle-specific and/or growth factor-related transcription.