These transcription elongation factor A (SII), 3 ELISA kits are immunodetection tools for measuring specific protein levels in biological samples. transcription elongation factor A (SII), 3 is an alias of the human TCEA3 gene, which encodes the protein, transcription elongation factor A3. The TCEA3 protein is 348 amino acid residues in length and 39 kilodaltons in mass. However, as many as 2 protein isoforms have been identified. It is localized to the nucleus of the cell. Other names for this target antigen include TFIIS, TFIIS.H, and transcription elongation factor A protein 3. Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.