Rat Anti-Mouse ALK4 (Activin R1B)
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|Centrifuge vial prior to opening. Reconstitute the antibody with 500 µl sterile PBS and the final concentration is 200 µg/ml.
|Stability and Storage
|Lyophilized samples are stable for 2 years from date of receipt when stored at -70°C. Reconstituted antibody can be aliquoted and stored frozen at < -20°C for at least six months without detectable loss of activity.
|This antibody was produced from a hybridoma (mouse myeloma fused with spleen cells from a rat immunized with purified mouse recombinant ALK4 extracellular domain. The IgG2 fraction of the culture supernatant was purified by Protein A/G affinity chromatography.
|recombinant mouse ALK4 extracellular domain
|Acvr1b; Alk4; SKR2; ActRIB; ActR-IB; Acvrlk4; 6820432J04
|Activin RIB, also known as ALK4, is a glycosylated 58 kDa type I transmembrane receptor that belongs to the superfamily of TGFβ serine/threonine kinase receptors. Activin RIB associates with Activin RIIB to form a receptor complex for activin and inhibin molecules. These ligands bind to Activin RIIB which then associates with, and phosphorylates, the cytoplasmic domain of Activin RIB to initiate signal transduction. Mature mouse Activin RIB consists of a 103 amino acid (aa) extracellular domain (ECD), a 23 aa transmembrane segment, and a 356 aa cytoplasmic region that includes the kinase domain. Within the ECD, mouse Activin RIB shares 93% and 98% aa sequence identity with human and rat Activin RIB, respectively. It shares 23% 38% aa sequence identity with other mouse type I receptors Activin RIA, BMPRIA, BMPRIB, and TGFβ RI. Activin receptor signaling is modulated by the direct interaction of Activin RIB with cripto or inhibin binding protein. Activin RIB is excluded from the signaling complex if Activin RIIB first binds inhibin and betaglycan (8). Activin RIB functions in a wide variety of growth and differentiation processes, including embryonic cell fate and axis determination, cell proliferation, apoptosis, and tumorigenesis.
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