Predicted to enable several functions, including chromatin binding activity; mRNA binding activity; and protein heterodimerization activity. Involved in positive regulation of transcription by RNA polymerase II. Predicted to be located in nucleoplasm. Predicted to be part of DSIF complex. Orthologous to human SUPT5H (SPT5 homolog, DSIF elongation factor subunit). [provided by Alliance of Genome Resources, Apr 2022]