SSRP1 is a nuclear protein and a component of the FACT complex (facilitates chromatin transcription). The FACT140 complex is composed of the Spt16 and the SSRP1 proteins. This complex interacts with nucleosomes and histone H2A/H2B dimers to promote nucleosome disassembly and allow transcription elongation. This protein interacts with dsDNA. The SSRP1 protein has been shown to be modified by cisplatin and may protect DNA from repair and block DNA replication. The 3E4 monoclonal antibody recognizes human SSRP1 and has been shown to be useful for Western blotting.