Spt16 is a Component of the FACT complex, a general chromatin factor that acts to reorganize nucleosomes. The FACT complex is composed of two subunits: SSRP1 and Spt16. It is involved in multiple processes that require DNA as a template such as mRNA elongation, DNA replication and DNA repair. During transcription elongation the FACT complex acts as a histone chaperone that both destabilizes and restores nucleosomal structure. It facilitates the passage of RNA polymerase II and transcription by promoting the dissociation of one histone H2A-H2B dimer from the nucleosome, and then subsequently promotes the reestablishment of the nucleosome following the passage of RNA polymerase II [taken from the Universal Protein Resource (UniProt) www.uniprot.org/uniprot/Q9Y5B9].