Predicted to enable cis-regulatory region sequence-specific DNA binding activity. Predicted to be involved in positive regulation of transcription elongation by RNA polymerase II and snRNA transcription by RNA polymerase II. Predicted to act upstream of or within transcription elongation by RNA polymerase II and translational elongation. Predicted to be located in nucleus. Predicted to be part of transcription elongation factor complex. Is expressed in several structures, including anterior axial hypoblast; hatching gland; mesoderm; musculature system; and sensory system. Orthologous to human ELL2 (elongation factor for RNA polymerase II 2).