Recombinant Mouse Activin RIIA Fc Chimera Protein, CF

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Recombinant Mouse Activin RIIA Fc Chimera Protein, CF Summary

Product Specifications

>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<0.01 EU per 1 μg of the protein by the LAL method.
Measured by its ability to inhibit Activin A-induced hemoglobin expression in K562 human chronic myelogenous leukemia cells. Schwall, R.H. et al. (1991) Method Enzymol. 198:340. The ED50 for this effect is 6-36 ng/mL in the presence of 3 ng/mL of recombinant human Activin A (Catalog # 338-AC).
Mouse myeloma cell line, NS0-derived mouse Activin RIIA protein
Mouse Activin RIIA
(Met1 - Pro134)
Accession # P27038
(Glu98 - Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
40.5 kDa (monomer)
60-65 kDa, reducing conditions

Product Datasheets

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
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Background: Activin RIIA

Activin proteins are involved in a wide range of biological processes including mesoderm induction, neural cell differentiation, bone remodeling, hematopoiesis, the regulation of reproductive physiology, inflammation, and carcinogenesis (1 ‑ 3). They function through heteromeric complexes of type I and type II serine/threonine kinase receptors (2, 4). Dimeric ligands bind to a type II receptor, such as Activin Receptor IIA (ActRIIA), which then associates with a type I receptor to initiate signal transduction (4). ActRIIA mediates the pleiotropic effects of Activins and Inhibins as well as several members of the BMP and GDF families of TGF-beta like proteins (4). Mature mouse ActRIIA is a 70 kDa glycoprotein that consists of a 116 amino acid (aa) extracellular domain (ECD), a 26 aa transmembrane segment, and a 352 aa cytoplasmic region that includes the kinase domain and a PDZ-binding motif (5). Within the ECD, mouse ActRIIA shares 98% and 100% aa sequence identity with human and rat ActRIIA, respectively. Signaling through ActRIIA is modulated by its interaction with RGM-B/DRAGON, Cripto, Endoglin/CD105, TGF-beta RIII/Betaglycan, or BAMBI (6 - 10). These interactions can enhance ligand-induced signaling or interfere with signaling by preventing ActRIIA association with type I receptors (6 - 9). Activin-induced responses can also be limited by the enhanced internalization of ActRIIA following its association with the cytoplasmic proteins ARIP1 and ARIP2 (11, 12).

  1. Welt, C. et al. (2002) Exp. Biol. Med. 227:724.
  2. Chen, Y.-G. et al. (2006) Exp. Biol. Med. 231:534.
  3. Werner, S. and C. Alzheimer (2006) Cytokine Growth Factor Rev. 17:157.
  4. de Caestecker, M. (2004) Cytokine Growth Factor Rev. 15:1.
  5. Mathews, L.S. and W.W. Vale (1991) Cell 65:973.
  6. Samad, T.A. et al. (2005) J. Biol. Chem. 280:14122.
  7. Gray, P.C. et al. (2003) Proc. Natl. Acad. Sci. 100:5193.
  8. Lewis, K.A. et al. (2000) Nature 404:411.
  9. Onichtchouk, D. et al. (1999) Nature 401:480.
  10. Barbara, N.P. et al. (1999) J. Biol. Chem. 274:584.
  11. Shoji, H. et al. (2000) J. Biol. Chem. 275:5485.
  12. Matsuzaki, T. et al. (2002) J. Biol. Chem. 277:19008.
Long Name
Activin Receptor IIA
Entrez Gene IDs
92 (Human); 11480 (Mouse)
Alternate Names
activin A receptor, type II; activin A receptor, type IIA; Activin receptor type IIA; activin receptor type-2A; Activin RIIA; ActivinRIIA; ACTRII; ACTRIIA; ACVR2A; ACVR2ACTR-IIA; AVR2A; EC 2.7.11; EC


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Recombinant Mouse Activin RIIA Fc Chimera Protein, CF
By Anonymous on 04/07/2020
Application: Binding assay/Protein-protein interaction