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#27158 Human Osteopontin Assay Kit - IBL

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Intended Use:
Research reagents
Measuring Method:
Sample Types:
Measuring Samples:
EDTA-plasma,Urine,Cell culture supernatant
Measurement Range:
5 ~ 320 ng/mL (76.9 ~ 4,920 pmol/L)
Package Size1:
96 Well

Product Overview

Product Code 27158
Product Name Human Osteopontin Assay Kit - IBL
Intended Use Research reagents
Measuring Method ELISA
Conjugate HRP
Species Human
Measuring Samples EDTA-plasma,Urine,Cell culture supernatant
Measurement Range 5 ~ 320 ng/mL (76.9 ~ 4,920 pmol/L)
Primary Reaction 60minutes at 37℃
Secondary Reaction 30minutes at 2 - 8℃
Sensitivity 3.33 ng/mL (51.2 pmol/L)
Specificity Compound Cross Reactivity
human-OPN 100.0%
mouse-OPN 0.20%
rat-OPN ≦0.1%
Storage Condition 2 - 8 ℃
Poisonous and Deleterious Substances Not Applicable
Cartagena Not Applicable
Measuring Service Not Available
Package Size 1 96 Well

Product Description

Osteopontin (OPN) is a secreted glycoprotein that was originally isolated from bone. At present, it is known as a highly acidic calcium-binding glycosylated phosphoprotein secreted by many cell types, including osteoblasts, kidney tubule cells, macrophages, activated T cells, and vascular smooth muscle cells. Its molecular weights have been reported in the range of 66 kDa to 44 kDa depending on glycosylation and phosphorylation. One important feature of OPN is that it contains an Arg-Gly-Asp (RGD) amino acid sequence. This motif is present in fibronectin, vitronectin and a variety of other extra cellular proteins that bind members of the integrin family of cell surface receptors such as αvβ3. Another important of OPN is the presence of various molecular forms in vivo due to differential RNA splicing, glycosylation, phosphorylation, sulfation, and susceptibility to proteases. Both OPN and thrombin are likely to be localized together at the site of injury, inflammation, and angiogenesis and in tumor tissues. Osteopontin is susceptible to proteolytic fragmentation, and this process may have physiologic importance. Recently, it was shown that an amino terminal OPN fragment contains a cryptic binding site that can be recognized by α9β1 integrin. Furthermore, OPN contains multiple cell binding sites and interacts with various receptors; these interactions may have distinct functional.


Note: Retrieve by PMID number in displayed by abstract:


  • Question
    Q.Can this kit be used for serum samples?
  • Answer
    A.Osteopontin is rapidly digested by Thrombin in serum samples. For this reason, we do not recommend using serum samples for the assay because the value would be much lower.
  • Question
    Q.There are two types of EDTA-plasma tubes (Na and K). Which one is best to use?
  • Answer
    A.Either tube can be used.
  • Question
    Q.What is the epitope of the pre-coated antibody (Anti-Human OPN (O-17) Rabbit IgG A.P.)?
  • Answer
    A.The epitope is IPVKQADSGSSEEKQ.
  • Question
    Q.Can this kit be used to measure crab-eating macaque samples?
  • Answer
    A.We do not have any data related to those types of samples.
  • Question
    Q.Can this kit be used for citrated-plasma samples?
  • Answer
    A.We do not recommend using the kit for citrated-plasma samples.
  • Question
    Q.Can this kit be used for bovine samples?
  • Answer
    A.No, it cannot.
  • Question
    Q.Is composition of EIA buffer of each ELISA kit all same? Can it be mixed to use?
  • Answer
    A.No it isn't. As constitute of each EIA buffer is different, it cannot be mixed with other lots or EIA buffers contained in other kind of ELISA kits.
  • Question
    Q.What is the composition of concentrated wash buffer?
  • Answer
    A.It contains ordinary Tween and phosphate buffer (0.05% Tween-20 in PB).
  • Question
    Q.What is the feature of the plate?
  • Answer
    A.We use plate that is flat bottom and removable strip type plate (8wellx 12 strips).
  • Question
    Q.Can I re-use standard after reconstitution?
  • Answer
    A.Not recommended to re-use standard after reconstitution. Please use it at once after the reconstitution.
  • Question
    Q.What is different between reagent blank and test sample blank?
  • Answer
    A.Reagent blank means a well is only added EIA buffer and the purpose is confirming whether the measuring value is influenced by lack of washing process. Test sample blank means a well is added EIA buffer and HRP antibody and the purpose is to calculate the background.
  • Question
    Q.How many samples can be measured by this kit?
  • Answer
    A.The pre-coated plate contained in our ELISA kit is 96 wells plate. We recommend to use 16 wells (2 slits) for standard and 80 wells (10 slits) for 40 samples in duplicate.

Note: This product is for research use only. It cannot be used as a diagnostic tool or drug.