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CDK9 (C12F7) Rabbit mAb (BSA and Azide Free) #66968

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    Supporting Data

    REACTIVITY H M R Hm Mk B Dg
    SENSITIVITY Endogenous
    MW (kDa) 42, 55
    Source/Isotype Rabbit IgG
    Application Key:
    • WB-Western Blotting 
    • IHC-Immunohistochemistry 
    • IF-Immunofluorescence 
    • F-Flow Cytometry 
    Species Cross-Reactivity Key:
    • H-Human 
    • M-Mouse 
    • R-Rat 
    • Hm-Hamster 
    • Mk-Monkey 
    • B-Bovine 
    • Dg-Dog 

    Product Information

    Product Usage Information

    This product is the carrier free version of product #2316. All data were generated using the same antibody clone in the standard formulation which contains BSA and glycerol.

    This formulation is ideal for use with technologies requiring specialized or custom antibody labeling, including fluorophores, metals, lanthanides, and oligonucleotides. It is not recommended for ChIP, ChIP-seq, CUT&RUN or CUT&Tag assays. If you require a carrier free formulation for chromatin profiling, please contact us. Optimal dilutions/concentrations should be determined by the end user.

    BSA and Azide Free antibodies are quality control tested by size exclusion chromatography (SEC) to determine antibody integrity.

    Formulation

    Supplied in 1X PBS (10 mM Na2HPO4, 3 mM KCl, 2 mM KH2PO4, and 140 mM NaCl (pH 7.8)). BSA and Azide Free.

    For standard formulation of this product see product #2316

    Storage

    Store at -20°C. This product will freeze at -20°C so it is recommended to aliquot into single-use vials to avoid multiple freeze/thaw cycles. A slight precipitate may be present and can be dissolved by gently vortexing. This will not interfere with antibody performance.

    Specificity / Sensitivity

    CDK9 (C12F7) Rabbit mAb (BSA and Azide Free) detects endogenous levels of total CDK9 protein, both 42 kDa and 55 kDa isoforms.

    Species Reactivity:

    Human, Mouse, Rat, Hamster, Monkey, Bovine, Dog

    Source / Purification

    Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy terminus of human CDK9.

    Background

    P-TEFb is a general transcription factor that regulates transcription elongation through phosphorylation of the C-terminal tail domain (CTD) of RNA polymerase II (RNAP II). The P-TEFb complex is composed of a catalytic subunit, CDK9, and its regulatory cyclin partner, which can be cyclin T1, T2a, T2b or K (reviewed in 1,2). P-TEFb is recruited by the HIV Tat protein to allow transcriptional elongation, and subsequent replication of the viral genome. Inhibition of P-TEFb function therefore has potential for HIV therapy. CDK9 exists as two isoforms, an abundant 42 kDa isoform, and a less abundant 55 kDa isoform, which contains an amino-terminal extension (3). The two forms likely have distinct purposes based on differential expression during lymphocyte activation (4,5) and on their localization within the nucleus (5).
    Cyclin dependent kinases (CDKs) are activated in part by cyclin binding and by phosphorylation of a conserved threonine in the T-loop domain. Phosphorylation of CDK9 at the T-loop Thr186 by an unidentified nuclear kinase may be important in P-TEFb activation (6) and regulation of HIV transcription (7). Acetylation of CDK9 at Lys44 affects its ability to phosphorylate the RNAPII CTD (8).
    For Research Use Only. Not For Use In Diagnostic Procedures.
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