The N-terminal part of the ELL-associated factor (Eaf) protein is Transcription elongation factor Eaf N-terminal (IPR019194). It works as a transcriptional transactivator for ELL and ELL2 RNA polymerase II (Pol II) transcription elongation factors. To make it easier for RNA polymerase II to bind and start transcription elongation, Eaf proteins and ELL proteins form stable heterodimeric complexes.