Human Follistatin-related Gene Protein/FLRG Antibody

Catalog # Availability Size / Price Qty
Product Details
Citations (1)
Supplemental Products

Human Follistatin-related Gene Protein/FLRG Antibody Summary

Species Reactivity
Detects human Follistatin-related Gene Protein/FLRG in ELISAs and Western blots. In sandwich immunoassays and Western blots, no cross‑reactivity with recombinant mouse FLRG is observed.
Monoclonal Mouse IgG1 Clone # 206714
Protein A or G purified from hybridoma culture supernatant
Mouse myeloma cell line NS0-derived recombinant human Follistatin-related Gene Protein/FLRG
Accession # O95633
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.


Recommended Concentration
Western Blot
1 µg/mL
Recombinant Human Follistatin-related Gene Protein/FLRG (Catalog # 1288-F3) under non‑reducing conditions only

Human Follistatin-related Gene Protein/FLRG Sandwich Immunoassay

Recommended Concentration
ELISA Capture (Matched Antibody Pair)
2-8 µg/mL 

Use in combination with:

Detection Reagent: Human Follistatin‑related Gene Protein/FLRG Biotinylated Antibody (Catalog # BAF1288)

Standard: Recombinant Human FLRG Protein (Catalog # 1288-F3)

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Reconstitution Calculator

Reconstitution Calculator

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Preparation and Storage

Reconstitute at 0.5 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: Follistatin-related Gene Protein/FLRG

Follistatin-related gene protein (FLRG), also known as follistatin-like 3 (FSTL3) is a glycoprotein belonging to the follistatin-module protein family. Human FLRG cDNA encodes a 263 amino acid (aa) residue protein with a putative 26 aa signal peptide, an N-terminal domain, two cysteine-rich follistatin-like domains (FS) and a C‑terminal acidic domain. Compared to follistatin, FLRG lacks the third FS domain found in follistatin. In addition, FLRG also lacks the heparin-binding domain found within the first amino-terminal FS domain of follistatin. Mouse and human FLRG share approximately 83% aa sequence homology. Like follistatin, FLRG has been shown to bind and inhibit the activities of TGF-beta family ligands including activin, BMP-2, -6, -7 and GDF-8/myostatin. While both FLRG and follistatin are located in a wide and overlapping range of adult and fetal tissue, their sites of peak expression differ: FLRG most highly in heart, lung, kidney, placenta and testis, while follistatin is highest in ovary and pituitary. The expression of FLRG is upregulated by TGF-beta  and activin signaling through Smad proteins. Although FLRG is a secreted protein in many cell types, it has also been localized to the nuclear compartment in HeLa, 293 and CHO cells (1‑5).

  1. Tsuchida, K. et al. (2000) J. Biol. Chem. 275:40778.
  2. Sidis, Y. et al. (2002) Endocrinology 143:1613.
  3. Tortoriello, D.V. et al. (2001) Endocrinology 142:3426.
  4. Hill, J. et al. (2002) J. Biol. Chem. 277:40735.
  5. Bartholin, L. et al. (2001) Oncogene 20:5409.
Entrez Gene IDs
10272 (Human); 83554 (Mouse)
Alternate Names
FLRG; FLRGFSRP; follistatin-like 3 (secreted glycoprotein); Follistatin-like 3; Follistatin-like protein 3; Follistatin-related gene protein; follistatin-related protein 3; FSTL3

Product Datasheets

Citation for Human Follistatin-related Gene Protein/FLRG Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. Prediction of gestational diabetes mellitus by maternal factors and biomarkers at 11 to 13 weeks.
    Authors: Nanda S, Savvidou M, Syngelaki A, Akolekar R, Nicolaides KH
    Prenat. Diagn., 2011;31(2):135-41.
    Species: Human
    Sample Types: Serum
    Applications: ELISA Development


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