AbFlex® RNA pol II CTD phospho Ser5 antibody (rAb)
|Aliases: RPB1, RPO2, POLR2, POLRA, RPBh1, RPOL2, RpIILS, hsRPB1, hRPB220|
|Catalog No: 91119||Format: 100 µg||$350||Buy|
|Catalog No: 91120||Format: 10 µg||$75||Buy|
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Applications Validated by Active Motif:
ChIP-Seq: 4 µg each
ICC/IF: 1 - 2 µg/ml
WB*: 0.5 - 2 µg/ml
Bead-based ELISA: 0.1 - 5 µg/ml
AbFlex® recombinant antibodies are genetically derived from DNA sequences of parental hybridoma clones. For details on the parental clone, see Catalog No. 61085.
*Note: many chromatin-bound proteins are not soluble in a low salt nuclear extract and fractionate to the pellet. Therefore, we recommend a High Salt / Sonication Protocol when preparing nuclear extracts for Western Blot.
This RNA pol II CTD phospho Ser5 antibody was raised against a peptide containing the RNA pol II CTD sequence phosphorylated at serine 5.
Purified IgG in 200 mM Hepes pH 7.5, 100 mm NaCl, 50 mM NaOAc, 30% glycerol and 0.035% sodium azide.
AbFlex® antibodies are recombinant antibodies (rAbs) that have been generated using defined DNA sequences to produce highly specific, reproducible antibodies. Each AbFlex antibody contains a 6xHis Tag, a Biotinylation Tag for enzymatic biotin conjugation using the biotin ligase, BirA, and a sortase recognition motif (LPXTG) to attach a variety of labels directly to the antibody including fluorophores, enzymatic substrates (HRP, AP), peptides, drugs as well as solid supports.
AbFlex® RNA pol II CTD phospho Ser5 antibody was expressed as full-length IgG with mouse immunoglobulin heavy and light chains (IgG2a isotype) in mammalian 293 cells.
RNA pol II (RNA polymerase II) is responsible for synthesizing messenger RNA in eukaryotes. RNA pol II contains a carboxy terminal domain composed of heptapeptide repeats that are essential for polymerase activity. These repeats contain serine and threonine residues that are phosphorylated in actively transcribing RNA polymerase. In addition, RNA pol II, in combination with several other polymerase subunits, form the DNA binding domain of the polymerase, a groove in which the DNA template is transcribed into RNA.
During the transcription cycle, the CTD of the large subunit of RNA pol II is reversibly phosphorylated. RNA pol II containing unphosphorylated CTD is recruited to the promoter, whereas the hyperphosphorylated CTD form is involved in active transcription. Phosphorylation occurs at two sites within the heptapeptide repeat, at serine 2, serine 5 and serine 7. RNA pol II Serine 5 phosphorylation is confined to promoter regions and is necessary for the initiation of transcription.
Active Motif's HeLa nuclear extract (Catalog No. 36010) can be used as a positive control for RNA Pol II CTD phospho Ser5 antibody.
Chromatin IP Assays
This antibody has been validated for use in ChIP and/or ChIP-Seq, and can be used with Active Motif's ChIP-IT® High Sensitivity Kit or our magnetic bead-based ChIP-IT® Express Kits. For an overview of all of our ChIP products, please visit our Chromatin IP Page to learn about ChIP products designed for use with AbFlex® RNA pol II CTD phospho Ser5 antibody (rAb).
Some products may be shipped at room temperature. This will not affect their stability or performance. Avoid repeated freeze/thaw cycles by aliquoting items into single-use fractions for storage at -20°C for up to 2 years. Keep all reagents on ice when not in storage.
This product is guaranteed for 12 months from date of receipt.
This product is for research use only and is not for use in diagnostic procedures.
- ChIP = Chromatin Immunoprecipitation;
- ChIP = ChIP Sequencing;
- CUT&RUN = Cleavage Under Targets and Release Using Nuclease;
- CUT&Tag = Cleavage Under Targets and Tagmentation;
- DB = Dot Blot;
- ELISA = Enzyme-linked Immunosorbent Assay;
- EMSA = Electrophoretic Mobility Shift Assay
- FC = Flow Cytometry;
- ICC = Immunocytochemistry;
- IF = Immunofluorescence;
- IHC = Immunohistochemistry;
- IP = Immunoprecipitation;
- MeDIP = Methyl-DNA Immunoprecipitation;
- NEU = Neutralizing;
- WB = Western Blotting