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HEXIM1 (D5Y5K) Rabbit mAb (BSA and Azide Free) #48494

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    Supporting Data

    REACTIVITY H Mk
    SENSITIVITY
    MW (kDa) 60
    Source/Isotype Rabbit IgG
    Application Key:
    • WB-Western Blotting 
    • IF-Immunofluorescence 
    • F-Flow Cytometry 
    Species Cross-Reactivity Key:
    • H-Human 
    • Mk-Monkey 

    Product Information

    Product Description

    MW (kDa) 60

    Product Usage Information

    This product is the carrier free version of product #12604. All data were generated using the same antibody clone in the standard formulation which contains BSA and glycerol.br /br /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 a href="https://www.cellsignal.com/services/carrier-free-and-customized-formulations/custom-formulations-request" target="_blank" contact us/a. Optimal dilutions/concentrations should be determined by the end user.br /br /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 Nasub2/subHPOsub4/sub, 3 mM KCl, 2 mM KHsub2/subPOsub4/sub, and 140 mM NaCl (pH 7.8)). BSA and Azide Free.br /br /For standard formulation of this product see product #a href="/products/12604" target="_blank"12604/a

    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

    HEXIM1 (D5Y5K) Rabbit mAb (BSA and Azide Free) recognizes endogenous levels of total HEXIM1 protein.

    Species Reactivity:

    Human, Monkey

    Source / Purification

    Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Gly63 of human HEXIM1 protein.

    Background

    Hexamethylene bis-acetamide-inducible protein 1 (HEXIM1) was originally identified in vascular smooth muscle cells as a protein that is upregulated upon treatment with the differentiating agent hexamethylene bisacetamide (1). HEXIM1 binds 7SK RNA, a highly abundant non-coding RNA, and together they act as a potent inhibitor of positive transcription elongation factor b (P-TEFb) (2,3). P-TEFb phosphorylates the C-terminal domain of the largest subunit of RNA polymerase II and is an important regulator of transcription elongation (4-8). 7SK RNA-bound HEXIM1 interacts with the cyclin T1 subunit of P-TEFb, sequestering P-TEFb in an inactive form leading to transcription inhibition (2,3). The regulation of the relative ratio of inactive to active P-TEFb in the cell by HEXIM1/7SK RNA is thought to play a critical role in regulation of a wide range of cellular gene expression programs such as estrogen and glucocorticoid receptor regulated genes (9-12).
    For Research Use Only. Not for Use in Diagnostic Procedures.
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