ELL is a family of RNA polymerase II elongation factors. It is bound stably to elongation-associated factors 1 and 2, EAFs, and together these act as a strong regulator of transcription activity. by direct interaction with Pol II. ELL binds to pol II on its own but the affinity is greatly increased by the cooperation of EAF [1]. Some members carry an Occludin domain Pfam:PF07303 just downstream. There is no S. cerevisiae member.

1: Identification and Characterization of a Schizosaccharomyces pombe RNA Polymerase II Elongation Factor with Similarity to the Metazoan Transcription Factor ELL. Banks CA, Kong SE, Spahr H, Florens L, Martin-Brown S, Washburn MP, Conaway JW, Mushegian A, Conaway RC; J Biol Chem. 2007;282:5761-5769. PMID:17150956