Detects human, mouse, and rat GDF-8/Myostatin in direct ELISAs and Western blots. In Western blots, approximately 15% cross‑reactivity is observed with recombinant human/mouse/rat GDF-11. In direct ELISAs, this antibody shows approximately 5% cross‑reactivity with recombinant mouse (rm) GDF‑5 and rmGDF‑6.
Polyclonal Goat IgG
E. coli-derived recombinant mouse GDF-8/Myostatin Asp268-Ser376 Accession # O08689
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.
<0.10 EU per 1 μg of the antibody by the LAL method.
Measured by its ability to neutralize GDF‑8/Myostatin-induced hemoglobin expression in the K562 human chronic myelogenous leukemia cell line. The Neutralization Dose (ND50) is typically 0.6-3 µg/mL in the presence of 30 ng/mL Recombinant Mouse GDF‑8/Myostatin.
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.
Hemoglobin Expression Induced by GDF‑8/Myostatin and Neutralization by Mouse GDF‑8/Myostatin Antibody. Recombinant Mouse GDF‑8/Myostatin (Catalog # 788-G8) increases hemoglobin expression in the K562 human chronic myelogenous leukemia cell line in a dose-dependent manner (orange line), as measured by the psuedoperoxidase assay. Hemoglobin expression elicited by Recombinant Mouse GDF‑8/Myostatin (30 ng/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Human/Mouse/Rat GDF‑8/Myostatin Antigen Affinity-purified Polyclonal Antibody (Catalog # AF788). The ND50 is typically 0.6-3 µg/mL.
GDF‑8/Myostatin in Mouse Embryo. GDF‑8/Myostatin was detected in immersion fixed frozen sections of mouse embryo (10 d.p.c., section through neural tube) using Goat Anti-Human/Mouse/Rat GDF‑8/Myostatin Antigen Affinity-purified Polyclonal Antibody (Catalog # AF788) at 15 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Goat HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS008) and counterstained with hematoxylin (blue). View our protocol for Chromogenic IHC Staining of Frozen Tissue Sections.
Preparation and Storage
Reconstitute at 0.2 mg/mL in sterile PBS.
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.
Growth Differentiation Factor 8 (GDF-8), also known as myostatin, is a member of the TGF-beta superfamily that is expressed specifically in developing and adult skeletal muscle. GDF-8 cDNA encodes a 376 amino acid (aa) prepropeptide with a 24 aa residue signal peptide, a 223 aa residue amino-terminal propeptide, and a 109 aa residue carboxy-terminal mature protein. Mature GDF-8 contains the canonical 7-cysteine motif common to other TGF-beta superfamily members. Similar to the TGF-beta s, activins and BMP-11, GDF-8 also contains one extra pair of cysteine residues that is not found in other family members. The bioactive form of GDF-8 is a homodimer with an apparent molecular weight of approximately 25 kDa. GDF-8 is highly conserved across species. At the amino acid sequence level, mature human, mouse, rat and cow GDF-8 are 100% identical. Within the TGF-beta superfamily, GDF-8 is most closely related to BMP-11, a mammalian protein that acts as a dorsal mesoderm and neural inducer in Xenopus explants. The two proteins share 90% amino acid sequence identity within their mature chain. A targeted disruption of GDF-8 in mouse results in large mice with a widespread increase in skeletal muscle mass, indicating that GDF-8 is a negative regulator of skeletal muscle growth. A mutation in the bovine GDF-8 gene has been shown to be responsible for the double-muscled phenotype in cattle breeds such as Belgian Blue cattle that is characterized by an increase in muscle mass. GDF-8 has also been shown to inhibit preadipocyte differentiation to adipocytes. Mature GDF-8 binds to activin type II receptors and the binding is antagonized by the activin-binding protein, follistatin. R&D Systems recombinant GDF-8 preparations have been shown to act similarly to Activin A in both the Xenopus animal cap and the K562 assays.
Storm, E.E. et al. (1994) Nature 368:639.
Sharma, M. et al. (1999) J. Cell Physiol. 180:1.
McPherron, A.C. et al. (1997) Nature 387:83.
Lee, S.J. et al. (2001) Proc. Natl. Acad. Sci. USA 98:9306.
Kim, H.S. et al. (2001) Biochem. Biophys. Res. Commun. 281:902.
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.
The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.