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Human Midkine / MDK Protein

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Human MDK/NEGF2 Protein Product Information
Synonym:FLJ27379, MK, NEGF2
Protein Construction:A DNA sequence encoding the human MDK (P21741) (Met 1-Asp 143) was expressed and purified.
Expressed Host:Baculovirus-Insect Cells
Shipping:In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Human MDK/NEGF2 Protein QC Testing
Purity:> 95 % as determined by SDS-PAGE
Bio-Activity:Measured by its binding ability in a functional ELISA.
Immobilized human MDK (Cat:10247-HNAB) at 10 μg/ml (100 μl/well) can bind mouse SDC4-Fc (Cat:50726-M02H) with a linear range of 0.16-1.25 μg/ml.
Endotoxin:< 1.0 EU per μg of the protein as determined by the LAL method
Stability:Samples are stable for up to twelve months from date of receipt at -70℃
Predicted N Terminal:Val 21
Molecule Mass:The secreted recombinant human MDK consists of 123 amino acids and predicts a molecular mass of 13.4 kDa. It migrates as an approximately 18 kDa band in SDS-PAGE under reducing conditions.
Formulation:Lyophilized from sterile 50mM PBS, 1 M NaCl, pH 6.8
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Human MDK/NEGF2 Protein Usage Guide
Storage:Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution:A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
Other MDK/NEGF2 Recombinant Protein Products
Midkine Background

Midkine (MK or MDK) also known as neurite growth-promoting factor 2 (NEGF2) is a basic heparin-binding growth factor of low molecular weight, and forms a family with pleiotrophin. Midkine is a retinoic acid-responsive, heparin-binding growth factor expressed in various cell types during embryogenesis. It promotes angiogenesis, cell growth, and cell migration. Midkine is also expressed in several carcinomas, suggesting that it may play a role in tumorigenesis, perhaps through its effects on angiogenesis. Midkine binds anaplastic lymphoma kinase (ALK) which induces ALK activation and subsequent phosphorylation of the insulin receptor substrate (IRS1), followed by the activation of mitogen-activated protein kinase (MAPK) and PI3-kinase, and the induction of cell proliferation. Midkine is involved in neointima formation after arterial injury, possibly by mediating leukocyte recruitment. Also involved in early fetal adrenal gland development. Midkine exhibited increased expression in the breast carcinomas but showed much lower expression in the normal breast tissue. Thus, it can be used as breast carcinomas marker.

Human Midkine References
  • Kadomatsu K, et al. (2004) Midkine and pleiotrophin in neural development and cancer. Cancer Lett. 204(2): 127-43.
  • Muramatsu H, et al. (1993) Midkine, a retinoic acid-inducible growth/differentiation factor: immunochemical evidence for the function and distribution. Dev Biol. 159(2): 392-402.
  • Muramatsu T. (2002) Midkine and pleiotrophin: two related proteins involved in development, survival, inflammation and tumorigenesis. J Biochem. 132(3): 359-71.
  • Kadomatsu K, et al. (2004) Midkine and pleiotrophin in neural development and cancer. Cancer Lett. 204(2): 127-43.
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    Catalog: 10247-HNAB-10
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    • Human Midkine / MDK Protein SDS-PAGE
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