Principle of the Assay: The microtiter plate provided in this kit has been pre-coated with an antibody specific to target antigen. Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody preparation specific for target antigen and then avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. Then a TMB substrate solution is added to each well. Only those wells that contain target antigen, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of a sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450 nm +/- 2 nm. The concentration of target antigen in the samples is then determined by comparing the O.D. of the samples to the standard curve.
NCBI and Uniprot Product Information
NCBI Description
The protein encoded by this gene binds to and negatively regulates activin, as well as other members of the transforming growth factor beta family, and acts to prevent uncontrolled cellular proliferation. This protein also contains a heparin-binding sequence. It is expressed in many of the tissues in which activin is synthesized and is thought to clear activin from the circulation by attachment to the cell surface. Alternative splicing results in multiple transcript variants that encode multiple protein isoforms, including FST315 and FST288, that differ at their C-terminus. Another isoform, FST303 is thought to be produced by proteolytic cleavage of FST315. These isoforms differ in their localization and in their ability to bind heparin. While FST315 is a circulating protein, FST288 is tissue-bound, and FST303 is gonad-specific. While deletion of all isoforms results in embryonic lethality, expression of just FST288 is sufficient for embryonic development, but the resultant mice have fertility defects. [provided by RefSeq, Aug 2014]
Uniprot Description
FST: Binds directly to activin and functions as an activin antagonist. Specific inhibitor of the biosynthesis and secretion of pituitary follicle stimulating hormone (FSH)
Protein type: Secreted, signal peptide; Secreted
Cellular Component: cytoplasm; extracellular region; nucleus
Molecular Function: activin binding; heparan sulfate proteoglycan binding
Biological Process: BMP signaling pathway; female gonad development; gamete generation; hair follicle morphogenesis; hemopoietic progenitor cell differentiation; keratinocyte proliferation; negative regulation of activin receptor signaling pathway; negative regulation of cell differentiation; negative regulation of transcription from RNA polymerase II promoter; odontogenesis of dentine-containing teeth; pattern specification process; positive regulation of hair follicle development; skeletal development
Research Articles on Fst
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Product Notes
The Mouse Fst fst (Catalog #AAA2886306) is an ELISA Kit and is intended for research purposes only. The product is available for immediate purchase. The AAA2886306 ELISA Kit recognizes Mouse Fst. It is sometimes possible for the material contained within the vial of "Follistatin, ELISA Kit" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.Precautions
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