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TFF1/pS2 Antibody #12419

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Inquiry Info. # 12419

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    Product Specifications

    REACTIVITY H M
    SENSITIVITY Endogenous
    MW (kDa) 13
    SOURCE Rabbit
    Application Key:
    • WB-Western Blotting 
    Species Cross-Reactivity Key:
    • H-Human 
    • M-Mouse 

    Product Information

    Product Usage Information

    Application Dilution
    Western Blotting 1:1000

    Storage

    Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at –20°C. Do not aliquot the antibody.

    Protocol

    Specificity / Sensitivity

    TFF1/pS2 Antibody recognizes endogenous levels of total TFF1/pS2 protein. This antibody reacts with precursor and mature forms of TFF1/pS2. Based upon sequence alignment, this antibody is not predicted to cross-react with either TFF2 or TFF3.

    Species Reactivity:

    Human, Mouse

    Source / Purification

    Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Val33 of human TFF1/pS2 protein. Antibodies are purified by protein A and peptide affinity chromatography.

    Background

    The trefoil factor (TFF) family of proteins (TFF1/pS2, TFF2, and TFF3) are a group of highly conserved, secreted polypeptides that are expressed by mucus-secreting cells of the gastrointestinal tract. Within the gastrointestinal tract, TFFs display both common and distinct expression patterns (1). Collectively, the TFF family of proteins play a prominant role in the protection and repair of the mucous epithelia lining the gastrointestinal tract through their interactions with mucins (2). TFFs have been shown to regulate a number of cellular processes such as migration, apoptosis, and proliferation. In humans, dysregulated expression of TFFs has been observed in inflammatory bowel diseases as well as tumors of the breast, colon, lung, and stomach (2).
    TFF1 is expressed predominantly by the gastric epithelia, in the upper portion of the glandular pits, and is highly expressed in some adenocarcinomas such as breast cancer (1,3,4). In the context of breast cancer, TFF1 is highly expressed in estrogen receptor-positive tumors. Indeed, TFF1 expression is directly regulated by estrogen receptor-α (4). In the stomach, secreted TFF1 is a component of the protective mucous layer. TFF1 expression is strongly induced after mucosal injury (5) and is involved in stomach ontogenesis and maintenance of the integrity of the mucosa (1,3). Research studies have shown frequent loss of TFF1 expression in more than two-thirds of gastric carcinomas resulting from mutation-independent mechanisms (6-8).

    Alternate Names

    BCEI; Breast cancer estrogen-inducible protein; breast cancer estrogen-inducible sequence; D21S21; gastrointestinal trefoil protein pS2; HP1.A; HPS2; P04155; pNR-2; Polypeptide P1.A; Protein pS2; pS2; TFF1; Trefoil factor 1

    For Research Use Only. Not for Use in Diagnostic Procedures.
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