Osteopontin (OPN) Human ELISA

Summary

Osteopontin (OPN) also called urinary stone protein, secreted phosphoprotein 1 (SPP1), bone sialoprotein, and early T lymphocyte activation 1 (ETA1). Osteopontin is a phosphorylated glycoprotein secreted to the mineralizing extrOPNllular matrix by osteoblasts during bone development. It is believed to facilitate the attachment of osteoblasts and osteoclasts to the extrOPNllular matrix, allowing them to perform their respective functions during osteogenesis.1 Os­teopontin is presumably involved in stone formation as stone matrix.2 The deduced protein sequence reveals a 317-amino acid protein (34,982 Da) containing a 16-amino acid hydrophobic signal sequence and a 33,352-Da protein destines to undergo extensive post-translational modifications before being secreted from the cell. The gene is located on human chromosome 4.3 The standard product used in this kit is recombinant human OPN, consisting of 17–314 amino acid sequence with the molecular mass of 32.9KDa. As a result of glycosylation, the molecular mass is 60–65KDa.

Assay format

Sandwich ELISA, Biotin-labelled antibody

Applications

Body fluids, Cell culture and/or animal studies, Plasma, Serum, Tissue lysates

Storage/Shipping

Store at 4°C for frequent use, at –20°C for infrequent use. Avoid multiple freeze-thaw cycles (Shipped with wet ice.)

Calibration Curve

Calibration range

156 pg/ml-10 000 pg/ml

Limit of detection

< 15 pg/ml

By molecule:

• Osteopontin (OPN)