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||The transcription factor IIB (TFIIB) is an essential factor for transcription by RNA Polymerase II. TFIIB has been shown to be required for selective binding of RNA Polymerase II, TFIIF and TFIID-DNA complex, and for specifying the start site of transcription. Human TFIIB is a single, 35 kDa polypeptide, homologous to yeast factor ε, the product of the SUA7 gene. The Transcription Factor IIB (TFIIB) is an essential factor for transcription by RNA polymerase II. Isolated from anE. colistrain that carries the coding sequence for human TFIIB under the control of a T7 promoter. GST-TFIIB has been used for protein-protein interaction assays.
||For in vitro use only.
||Liquid. Supplied in 20 mM Tris-HCl pH 8.0, 100 mM KCl, 0.2 mM EDTA, 1 mM DTT and 20% glycerol.
||100 ng are sufficient for a protein-protein interaction assay detected by immuno-blot system.
||> 95% by SDS-PAGE.
||Quality guaranteed for 12 months, store at -80℃. Avoid freeze / thaw cycles.