Detects mouse Osteoactivin/GPNMB in ELISAs and Western blots. In sandwich immunoassays, less than 0.2% cross-reactivity with recombinant human (rh) Osteoactivin, rhSyndecan-4, and recombinant mouse Syndecan-4 is observed.
Recombinant Mouse Osteoactivin/GPNMB Fc Chimera Protein, CF (Catalog # 2330-AC)
Measured by its ability to neutralize Osteoactivin/GPNMB-mediated adhesion of the SVEC4‑10 mouse vascular endothelial cell line. The Neutralization Dose (ND50) is typically 0.2-0.8 µg/mL in the presence of 0.25 µg/mL Recombinant Mouse Osteoactivin/GPNMB Fc Chimera.
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.
Cell Adhesion Mediated by Osteoactivin/GPNMB and Neutralization by Mouse Osteoactivin/GPNMB Antibody. Recombinant Mouse Osteoactivin/GPNMB Fc Chimera (Catalog # 2330-AC), immobilized onto a microplate previously coated with Goat Anti-Mouse IgG Fc (Catalog # G-202-C), supports the adhesion of the SVEC4‑10 mouse vascular endothelial cell line in a dose-dependent manner (orange line), as measured by endogenous cellular lysosomal acid phosphatase activity. Adhesion elicited by Recombinant Mouse Osteoactivin/GPNMB Fc Chimera (0.25 µg/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Mouse Osteoactivin/ GPNMB Antigen Affinity-purified Polyclonal Antibody (Catalog # AF2330). The ND50 is typically 0.2‑0.8 µg/mL.
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.
Osteoactivin (also named GPNMB and DC-HIL) is a 125 kDa, intracellular glycoprotein that is associated with cell endosomal/lysosomal compartments (1, 2). Mouse osteoactivin is synthesized as a type I, transmembrane, 574 amino acid (aa) precursor that contains a 22 aa signal sequence, a 478 aa luminal/extracellular domain, a 23 aa transmembrane segment and a 51 aa cytoplasmic tail. The luminal region contains an N-terminal heparin-binding motif, multiple glycosylation sites, an RGD motif and a 130 aa PKD domain. The intracellular tail also has an RGD motif, plus an ITAM (Y-x-x-I) and lysosomal targeting (L-L) motif. The extracellular/luminal region is 89% and 74% aa identical to the equivalent regions in rat and human, respectively. Cells known to express osteoactivin include osteoblasts, dendritic cells, and melanocytes, plus fetal chondrocytes and stratum basale keratinocytes (2, 3). Osteoactivin is reported to bind to heparan sulfate-proteoglycan, possibly on the surface of fibroblasts and endothelial cells (2). It may also interact with integrins.
Bachner, D. et al. (2002) Gene Exp. Patterns 1:159.
Shikano, S. et al. (2001) J. Biol. Chem. 276:8125.
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.
Submit a review and receive a $25US/€18/£15/$25CAN amazon gift card if you include an image - $10US/€7/£6/$10CAN Amazon card for reviews without an image. Limited to verified customers in USA, Canada and Europe.