CST, 64828S, SPT4 (D3P2W) Rabbit Monoclonal Antibody

Monoclonal Antibody for studying SPT4. Validated for WB,IP,ChIP,C&R,C&T. Available in 2 sizes. Highly specific and rigorously validated in-house, SPT4 (D3P2W) Rabbit Monoclonal Antibody (CST #64828) is ready to ship. Product Usage Information For optimal ChIP results, use 5 μl of antibody and 10 μg of chromatin (approximately 4 x 10 6 cells) per IP. This antibody has been validated using SimpleChIP ® Enzymatic Chromatin IP Kits. The CUT&RUN dilution was determined using CUT&RUN Assay Kit # 86652 . The CUT&Tag dilution was determined using CUT&Tag Assay Kit # 77552 . Western Blotting: 1:1000 Immunoprecipitation: 1:50 Chromatin IP: 1:100 CUT&RUN: 1:50 CUT&Tag: 1:50 Storage Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at -20°C. Do not aliquot the antibody. Protocol Available protocols: Western Blotting, Immunoprecipitation, Chromatin IP, CUT&RUN, CUT&Tag Specificity / Sensitivity SPT4 (D3P2W) Rabbit Monoclonal Antibody recognizes endogenous levels of total SPT4 protein. Species Reactivity: Human, Mouse, Rat, Monkey Source / Purification Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy terminus of human SPT4 protein. Background DRB-sensitivity inducing factor (DSIF), a heterodimer composed of SPT4 and SPT5, is capable of both facilitating and inhibiting RNA polymerase II (RNAPII) activity (1-3). DSIF, together with NELF (Negative Elongation Factor), inhibits RNAPII elongation, resulting in promoter proximal pausing of RNAPII as it awaits additional signaling to resume transcription (4). The release of promoter proximal pausing is signaled through phosphorylation of the RNAPII C-terminal domain (CTD) and NELF by positive transcription elongation factor (P-TEFb) (5). P-TEFb also phosphorylates SPT5 at Thr4 within the evolutionarily conserved heptapeptide repeat motif. This phosphorylation event switches DSIF from a transcriptional repressor to an activator where it becomes a critical factor for transcriptional elongation (6,7). Alternate Names DRB sensitivity-inducing factor 14 kDa subunit; DRB sensitivity-inducing factor small subunit; DSIF p14; DSIF small subunit; hSPT4; small hSpt4 subunit; SPT4; SPT4 homolog, DSIF elongation factor subunit; SPT4H; suppressor of Ty 4 homolog 1; suppressor of Ty 4 homolog 1 (S. cerevisiae); Supt4a; SUPT4H; SUPT4H1; Transcription elongation factor SPT4 Specification REACTIVITY: H M R Mk SENSITIVITY: Endogenous MW (kDa): 13 Source/Isotype: Rabbit IgG