Proteins in this family are subunits the FACT complex. The FACT complex plays a role in transcription initiation and promotes binding of TATA-binding protein (TBP) to a TATA box in chromatin [2].

1: The chromatin-specific transcription elongation factor FACT comprises human SPT16 and SSRP1 proteins. Orphanides G, Wu WH, Lane WS, Hampsey M, Reinberg D; Nature. 1999;400:284-288. PMID:10421373

2: The yeast FACT complex has a role in transcriptional initiation. Biswas D, Yu Y, Prall M, Formosa T, Stillman DJ; Mol Cell Biol. 2005;25:5812-5822. PMID:15987999