Human Follistatin-like 4/FSTL4 Alexa Fluor® 700-conjugated Antibody
R&D Systems, part of Bio-Techne | Catalog # AF4890N
Conjugate
Catalog #
Key Product Details
Species Reactivity
Human
Applications
Western Blot
Label
Alexa Fluor 700 (Excitation = 675-700 nm, Emission = 723 nm)
Antibody Source
Polyclonal Sheep IgG
Product Specifications
Immunogen
Chinese hamster ovary cell line CHO-derived recombinant human Follistatin-like 4/FSTL4
Trp23-Val842
Accession # NP_055897
Trp23-Val842
Accession # NP_055897
Specificity
Detects human Follistatin-like 4/FSTL4 in direct ELISAs and Western blots. In direct ELISAs and Western blots, approximately 10% cross‑reactivity with recombinant mouse FSTL4 is observed and less than 1% cross-reactivity with recombina
Clonality
Polyclonal
Host
Sheep
Isotype
IgG
Applications
Application
Recommended Usage
Western Blot
Optimal dilution of this antibody should be experimentally determined.
Formulation, Preparation, and Storage
Purification
Antigen Affinity-purified
Formulation
Supplied 0.2mg/ml in 1X PBS with RDF1 and 0.09% Sodium Azide
Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Protect from light. Do not freeze. 12 months from date of receipt, 2 to 8 °C as supplied
Background: Follistatin-like 4/FSTL4
Follistatin-like 4 (FSTL4) is a presumably secreted member of the follistatin domain-containing protein family (1). Follistatin itself is a potent inhibitor of the TGF-beta superfamily member, activin (1, 2), and this activity is reflected in several other proteins of this family that contain varying numbers of the cysteine-rich follistatin domain. Many of these are matrix proteins such as SPARC and testican for which TGF-beta superfamily inhibition status is presumed but unknown (2, 3). R&D Systems recombinant human FSTL4 inhibits the ability of a TGF-beta superfamily member, BMP-6, to induce osteoblast differentiation of a mouse fibroblast cell line. Human FSTL4 cDNA encodes an 842 amino acid (aa) protein containing a 22 aa signal sequence, a follistatin (EGF- and kazal-like) domain, an EF-hand calcium-binding motif, and two Ig-like cell adhesion molecule-type (IgCAM) domains (1, 4). The second IgCAM domain contains a consensus sequence for FGF/FGF receptor interaction (4). Mature human FSTL4 shares 84%, 82% and 82% aa identity with mouse, rat and bovine FSTL4, respectively. Identity with other follistatin-like family members is mainly within consensus residues of the follistatin domain. Of two reported human FSTL4 isoforms, one is missing the follistatin and EF-hand domains, while the other contains all recognized domains, but is truncated after aa 600 (4).
Alternate Names
Follistatin like 4, FSL4, FSTL4
Gene Symbol
FSTL4
UniProt
Additional Follistatin-like 4/FSTL4 Products
Product Specific Notices
This product is provided under an agreement between Life Technologies Corporation and R&D Systems, Inc, and the manufacture, use, sale or import of this product is subject to one or more US patents and corresponding non-US equivalents, owned by Life Technologies Corporation and its affiliates. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The sale of this product is expressly conditioned on the buyer not using the product or its components (1) in manufacturing; (2) to provide a service, information, or data to an unaffiliated third party for payment; (3) for therapeutic, diagnostic or prophylactic purposes; (4) to resell, sell, or otherwise transfer this product or its components to any third party, or for any other commercial purpose. Life Technologies Corporation will not assert a claim against the buyer of the infringement of the above patents based on the manufacture, use or sale of a commercial product developed in research by the buyer in which this product or its components was employed, provided that neither this product nor any of its components was used in the manufacture of such product. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, Cell Analysis Business Unit, Business Development, 29851 Willow Creek Road, Eugene, OR 97402, Tel: (541) 465-8300. Fax: (541) 335-0354.
For research use only
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