Recombinant Mouse Osteopontin

Osteopontin (OPN) also known as bone sialoprotein I (BSP-1), early T-lymphocyte activation (ETA-1), and Secreted phosphoprotein 1 (SPP1) is a secreted phosphoprotein that confers on cancer cells a migratory phenotype and activates signaling pathways that induce cell survival, proliferation, invasion, and metastasis.¹ OPN is also considered as a proinflammatory cytokine.² OPN has been studied as a multifunctional protein that is upregulated in a variety of acute and chronic inflammatory conditions, such as wound healing, fibrosis, autoimmune disease, and atherosclerosis. OPN is highly expressed at sites with atherosclerotic plaques, especially those associated with macrophages and foam cells.³

Histidine Tag

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Leu17

Lyophilized

The predicted molecular weight of Recombinant Mouse Osteopontin is Mr 31.5 kDa. However, the actual molecular weight as observed by migration on SDS-PAGE is Mr 65 dKa doublet and a 30 kDa band.

31.5

This recombinant protein was 0.2 µm filtered and lyophilized from modified Dulbecco’s phosphate buffered saline (1X PBS) pH 7.2 – 7.3 with no calcium, magnesium, or preservatives.

This lyophilized protein is stable for six to twelve months when stored desiccated at -20°C to -70°C. After aseptic reconstitution, this protein may be stored at 2°C to 8°C for one month or at -20°C to -70°C in a manual defrost freezer. Avoid Repeated Freeze Thaw Cycles. See Product Insert for exact lot specific storage instructions.

Next Day Ambient

1. Arafat, H. et al. (2009) Surgery. 146(2):232-40.
2. Xue, S. et al. (2009) Heart Vessels 24: 116
3. Kim, HS. et al. (2009) Curr Atheroscler Rep. 11: 206