Overview

  • Product name

    Human TFF1 ELISA Kit
  • Detection method

    Colorimetric
  • Precision

    Intra-assay
    Sample n Mean SD CV%
    1 16 92pg/ml 3.5 3.8%
    2 16 332pg/ml 14.94 4.5%
    3 16 585pg/ml 32.76 5.6%
    Inter-assay
    Sample n Mean SD CV%
    1 24 103pg/ml 4.84 4.7%
    2 24 310pg/ml 16.43 5.3%
    3 24 605pg/ml 38.72 6.4%
  • Sample type

    Cell culture supernatant, Serum, Cell Lysate, Heparin Plasma, EDTA Plasma, Tissue Homogenate
  • Assay type

    Sandwich (quantitative)
  • Sensitivity

    < 10 pg/ml
  • Range

    15.6 pg/ml - 1000 pg/ml
  • Assay time

    3h 30m
  • Assay duration

    Multiple steps standard assay
  • Species reactivity

    Reacts with: Human
  • Product overview

    The Human TFF1 Enzyme-Linked Immunosorbent Assay (ELISA) kit (ab213833) is designed for the quantitative measurement of Human TFF1 in cell culture supernatants, cell lysates, tissue homogenates, serum and plasma (heparin, EDTA). 


    The ELISA kit is based on standard sandwich enzyme-linked immune-sorbent assay technology. A monoclonal antibody from mouse specific for TFF1 has been pre-coated onto 96-well plates. Standards (Expression system for standard: E.coli; Immunogen sequence: E25-F84) and test samples are added to the wells, a biotinylated detection polyclonal antibody from goat specific for TFF1 is added subsequently and then followed by washing with PBS or TBS buffer. Avidin-Biotin-Peroxidase Complex is added and unbound conjugates are washed away with PBS or TBS buffer. HRP substrate TMB is used to visualize HRP enzymatic reaction. TMB is catalyzed by HRP to produce a blue color product that changed into yellow after adding acidic stop solution. The density of yellow is proportional to the Human TFF1 amount of sample captured in plate.

  • Notes

    TFF1 (Trefoil factor 1), also known as pS2, is a protein that in humans is encoded by the TFF1 gene. Members of the trefoil family are characterized by having at least one copy of the trefoil motif, a 40 amino acid domain that contains three conserved disulfides. They are stable secretory proteins expressed in gastrointestinal mucosa. Their functions are not defined, but they may protect the mucosa from insults, stabilize the mucus layer, and affect healing of the epithelium. It is found that TFF1 in normal human urine inhibited the growth of calcium oxalate crystals. Urinary TFF1 showed an inhibitory potency similar to that of nephrocalcin, and inhibition was dose dependent and inhibited by TFF1 antisera, particularly by antisera directed to the TFF1 C terminus. Concentrations and relative amounts of TFF1 in the urine of patients with idiopathic calcium oxalate kidney stones were significantly less than those found in controls. This gene, which is expressed in the gastric mucosa, has also been studied because of its expression in human tumors. This gene and two other related trefoil family member genes are found in a cluster on chromosome 21.

  • Tested applications

    Suitable for: Sandwich ELISAmore details
  • Platform

    Pre-coated microplate (12 x 8 well strips)

Properties

  • Storage instructions

    Store at -20°C. Please refer to protocols.
  • Components Identifier 1 x 96 tests
    ABC Diluent Buffer Blue Cap 1 x 12ml
    Adhesive Plate Seal 4 units
    Antibody Diluent Buffer Green Cap 1 x 12ml
    Anti-Human TFF1 coated Microplate (12 x 8 wells) 1 unit
    Avidin-Biotin-Peroxidase Complex (ABC) 1 x 130µl
    Biotinylated anti-Human TFF1 antibody 1 x 130µl
    Lyophilized recombinant Human TFF1 standard 2 vials
    Sample Diluent Buffer Green Cap 1 x 30ml
    TMB Color Developing Agent Black Cap 1 x 10ml
    TMB Stop Solution Yellow Cap 1 x 10ml
  • Research areas

  • Function

    Stabilizer of the mucous gel overlying the gastrointestinal mucosa that provides a physical barrier against various noxious agents. May inhibit the growth of calcium oxalate crystals in urine.
  • Tissue specificity

    Found in stomach, with highest levels in the upper gastric mucosal cells (at protein level). Detected in goblet cells of the small and large intestine and rectum, small submucosal glands in the esophagus, mucous acini of the sublingual gland, submucosal glands of the trachea, and epithelial cells lining the exocrine pancreatic ducts but not in the remainder of the pancreas (at protein level). Scattered expression is detected in the epithelial cells of the gallbladder and submucosal glands of the vagina, and weak expression is observed in the bronchial goblet cells of the pseudostratified epithelia in the respiratory system (at protein level). Detected in urine (at protein level). Strongly expressed in breast cancer but at low levels in normal mammary tissue. It is regulated by estrogen in MCF-7 cells. Strong expression found in normal gastric mucosa and in the regenerative tissues surrounding ulcerous lesions of gastrointestinal tract, but lower expression found in gastric cancer (at protein level).
  • Sequence similarities

    Contains 1 P-type (trefoil) domain.
  • Cellular localization

    Secreted.
  • Information by UniProt
  • Alternative names

    • BCEI
    • Breast cancer estrogen inducible protein
    • Breast cancer estrogen inducible sequence
    • Breast cancer estrogen-inducible protein
    • D21S21
    • Gastrointestinal trefoil protein
    • Gastrointestinal trefoil protein pS2
    • hP1.A
    • HP1A
    • HPS 2
    • HPS2
    • pNR 2
    • PNR-2
    • pNR2
    • Polypeptide P1.A
    • Protein pS2
    • PS 2
    • pS2
    • pS2 protein
    • TFF 1
    • TFF1
    • TFF1_HUMAN
    • Trefoil factor 1
    see all
  • Database links

Applications

Our Abpromise guarantee covers the use of ab213833 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
Sandwich ELISA Use at an assay dependent concentration.

Images

  • Human TFF1 ELISA Kit (ab213833) Standard Curve.

Protocols

References

ab213833 has not yet been referenced specifically in any publications.

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