SPT3 (E203) Polyclonal Antibody Catalogue Numbers:BS1890-50, BS1890-100 Product: Rabbit IgG, 1mg/ml in PBS with 0.02% sodium azide, 50% glycerol, pH7.2 Swiss-Prot: O75486 Host: Rabbit Reactivity: Human, Mouse, Rat Applications: IHC All Applications: IHC: 1:50~1:200 Background: The transcription of many RNA polymerase II-dependent genes requires Spt3, a member of the S. cerevisiae SAGA complex. Transcription from δ sequences, the long terminal repeats that flank yeast Ty elements, requires the yeast SPT3 gene. Spt3 and Spt20 work together to recruit TATA-box binding protein (TBP) to the core promoter allowing TBP to bind to SAGA-dependent promoters. Null mutations in the Spt3 gene cause defects in sporulation, diploid filamentous growth, and haploid invasive growth, indicating that Spt3 has an important role in both mating and development pathways in yeast. At the promoters of some genes including yeast HO, HIS3 and TRP3 genes, Spt3 inhibits binding of TBP, resulting in reduced transcription. This repressive effect of Spt3 can be overcome by another member of the SAGA complex, GCN5, which promotes the formation of a TBP/TFIIA complex by histone acetylation. Purification and Purity: The antibody was affinity-purified from rabbit antiserum by affinity-chromatography using epitope-specific immunogen and the purity is > 95% (by SDS-PAGE). Storage and Stability: Store at 4°C short term. Aliquot and store at -20°C long term. Avoid freeze-thaw cycles. Bioworld Molecular Weight: ~ 50 kDa Specificity: SPT3 (E203) polyclonal antibody detects endogenous levels of SPT3 protein. Note: For research use only, not for use in diagnostic procedure. Alternative Name: Transcription initiation protein SPT3 homolog; SPT3-like protein; SUPT3H Immunogen: Synthetic peptide, corresponding to amino acids 181-230 of Human SPT3. Conjugate: Unconjugated Modification: Unmodified
