CST, 14894T, COBRA1 (D6K9A) Rabbit Monoclonal Antibody

Monoclonal Antibody for studying COBRA1. Validated for WB,IP,ChIP,ChIP. Available in 2 sizes. Highly specific and rigorously validated in-house, COBRA1 (D6K9A) Rabbit Monoclonal Antibody (CST #14894) is ready to ship. Product Usage Information For optimal ChIP and ChIP-seq results, use 10 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. Western Blotting: 1:1000 Immunoprecipitation: 1:50 Chromatin IP: 1:50 Chromatin IP-seq: 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, Chromatin IP-seq Specificity / Sensitivity COBRA1 (D6K9A) Rabbit Monoclonal Antibody recognizes endogenous levels of total COBRA1 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 COBRA1 protein. Background Negative Elongation Factor (NELF) consists of four subunits: WHSC2 (NELF-A), COBRA-1 (NELF-B), TH1L (NELF-C/D), and NELF-E (1). NELF, together with DRB-sensitivity inducing factor (DSIF), inhibits RNA Polymerase II (RNAPII) elongation resulting in RNAPII promoter proximal pausing, where it waits additional signaling to resume transcription (2,3). The release of RNAPII from promoter proximal pausing is a critical regulatory point during transcription and is signaled by positive transcription elongation factor (p-TEF-b) phosphorylation of both NELF and the carboxy-terminal domain (CTD) within the largest subunit of RNAPII (3,4). WHSC2 is thought to connect the NELF complex to RNAPII machinery, while NELF-E contains an RNA binding motif that is necessary for NELF function (1,5,6). TH1L, together with COBRA-1, are integral subunits that bring WHSC2 and NELF-E together in the NELF complex (1). Cofactor of BRCA1 (COBRA1, NELF-B) was first identified as a factor that interacts with the BRCT domain of the tumor suppressor protein BRCA1 (7). COBRA1 is a modulator of ligand dependent and independent expression of estrogen receptor-α target genes (8,9). COBRA1 expression is reduced in metastatic and recurrent breast cancer, suggesting that low levels of COBRA1 in breast cancers may serve as an indicator for poor prognosis (10). Alternate Names COBRA1; Cofactor of BRCA1; DKFZp586B0519; KIAA1182; Negative elongation factor B; negative elongation factor complex member B; negative elongation factor protein B; NELF-B; NELFB Specification REACTIVITY: H M R Mk SENSITIVITY: Endogenous MW (kDa): 65 Source/Isotype: Rabbit IgG