Ephrin-A4 (EFNA4)

Links to databases

Ephrin-A4 (also known as EPH-related receptor tyrosine kinase ligand 4) is a member of the ephrin family, which comprise the largest subfamily of receptor protein-tyrosine kinases. EFNA4 binds promiscuously to Eph receptors on adjacent cells, leading to contact-dependent bidirectional signaling into neighboring cells. Ephrin proteins have been implicated in mediating developmental events, especially in the nervous system and in erythropoiesis and are thought to be crucial for cellular migration, repulsion and adhesion during these processes. Ephrin-A4 has a suggested role in axon guidance, the chemotactic process by which migration of an axon growth cone is directed to a specific target site.

Sample type

Recommended sample types are human EDTA plasma and serum. A range of additional sample types are compatible with the technology (PEA), including citrate plasma, heparin plasma, cerebrospinal fluid, (CSF), tissue and cell lysates, fine needle biopsis, microdialysis fluid, cell culture media, dried blood spots, synovial fluid, saliva, plaque extract and microvesicles. Please note that protein expression levels are expected to vary in different sample types. Certain assays are differentially affected by interfering substances such as hemolysate. Download any of our Data Validation documents or contact support@olink.com for more information.

NOTE: The calibrator curve below shows the performance of the assay with the estimated sensitivity and dynamic range parameters indicated. These curves are generated during the assay validation process using recombinant antigens. Please note that when analyzing biological samples the data generated will be given in the form of relative quantification (NPX values) and cannot be converted to absolute protein concentrations. For more info about NPX measurements, please visit our FAQ page.

Analytical Measuring Range

    • LOD (pg/mL)
    • 61.04
    • LLOQ (pg/mL)
    • 122.07
    • ULOQ (pg/mL)
    • 31250
    • Hook (pg/mL)
    • 31250
    • Range (logs)
    • 2.4

Calibrator curve generated in multiplex

Ephrin-A4 (EFNA4)

Precision

    • Within run precision Coefficient of Variation (CV)
    • 9%
    • Between run precision Coefficient of Variation (CV)
    • 10%

Precision (repeatability) is calculated from linearized NPX values over LOD.

Biomarker Validation Data

Additional validation data, as well as a more detailed description of how the Olink panels are quality controlled can be found in our Data Validation documents. To download or to learn more go to the Data Validation page.

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