The protein encoded by this gene, a member of the HMGN protein family, is thought to reduce the compactness of the chromatin fiber in nucleosomes, thereby enhancing transcription from chromatin templates. Transcript variants utilizing alternative polyadenylation signals exist for this gene.
^Birger Y, Ito Y, West KL, Landsman D, Bustin M (May 2001). "HMGN4, a newly discovered nucleosome-binding protein encoded by an intronless gene". DNA Cell Biol. 20 (5): 257–64. PMID11410162. doi:10.1089/104454901750232454.