>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
<1.0 EU per 1 μg of the protein by the LAL method.
Measured by its ability to inhibit rhBMP-4-induced alkaline phosphatase production by ATDC5 mouse chondrogenic cells. Nakamura, K. et al. (1999) Exp. Cell Res. 250:351. The ED50 for this effect is 0.5‑1.5 µg/mL in the presence of 30 ng/mL of rhBMP-4.
Mouse myeloma cell line, NS0-derived human BMPR-IB/ALK-6 protein
Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in sterile 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.
Cellular responses to bone morphogenetic proteins (BMPs) have been shown to be mediated by the formation of hetero-oligomeric complexes of the type I and type II serine/threonine kinase receptors. BMP receptor IB (BMPR-IB), also known as activin receptor-like kinase (ALK)-6, is a one of seven known type I serine/threonine kinases that are required for the signal transduction of TGF-beta family cytokines. In contrast to the TGF-beta receptor system in which the type I receptor does not bind TGF-beta in the absence of the type II receptor, type I receptors involved in BMP signaling (including BMPR-IA, BMPR-IB/ALK-6, and ActR-I/ALK-2) can independently bind the various BMP family proteins in the absence of type II receptors. Recombinant soluble BMPR-IB binds BMP-4 with high-affinity in solution and is a potent BMP-4 antagonist in vitro.BMPR-IB is expressed in various tissues during embryogenesis. In adult tissues, BMPR-IB is only found in the brain. The extracellular domain of BMPR-IB shares little amino acid sequence identity with the other mammalian ALK type I receptor kinases, but the cysteine residues are conserved. Human and mouse BMPR-IB are highly conserved and share 98% sequence identity.
Kawabata, M. et al. (1998) Cytokine and Growth Factor Reviews 9:49.
Ebendal, T. et al. (1998) J. Neuroscience Research 51:139.
Bone Morphogenetic Protein Receptor IB
Entrez Gene IDs:
658 (Human); 12167 (Mouse)
activin receptor-like kinase 6; ALK-6; ALK6CDw293; BMP type-1B receptor; BMPR1B; BMPR-1B; BMPRIB; BMPR-IB; bone morphogenetic protein receptor type-1B; bone morphogenetic protein receptor, type IB; CDw293 antigen; CDw293; EC 2.7.11; EC 126.96.36.199; serine/threonine receptor kinase
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