The function of Ensembl gene identifier ENSG00000119138 (KLF9, KLF transcription factor 9) is as follows. Transcription factor that binds to GC box promoter elements. Selectively activates mRNA synthesis from genes containing tandem repeats of GC boxes but represses genes with a single GC box. Acts as an epidermal circadian transcription factor regulating keratinocyte proliferation (PubMed:22711835). .