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Recombinant Human IL4 Protein

"IL4" Related Products.
Product Overview:
Recombinant Human IL-4, His 25 - Ser 153 (Accession # AAH67514) was produced in human 293 cells (HEK293).
Predicted N Terminal:
His 25
Lyophilized from sterile 20 mM MES, 200 mM NaCl, pH6.0, 10% Trehalose.
Measured by its binding ability in a functional ELISA. Immobilized Human IL-4 at 5 μg/mL (100 μL/well) can bind Human IL-4 R alpha, His Tag with a linear range of 0.01-0.1 μg/mL. The bio-activity was determined by dose-dependent stimulation of the proliferation of TF-1 cells. The ED50< 0.2 ng/mL, corresponding to a specific activity of >5000000 Unit/mg.
Molecular Mass:
Human IL-4 contains no "tag", and has a calculated MW of 14.9 kDa. The reducing protein migrates as 15 and 19 kDa in SDS-PAGE due to glycosylation.
Less than 0.1 EU per μg by the LAL method.
>90% as determined by SDS-PAGE.
Samples are stable for up to twelve months from date of receipt at -70ºC.
Store it under sterile conditions at -20ºC~-70ºC. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
It is recommended that sterile water be added to the vial to prepare a stock solution of 0.2 ug/ul. Centrifuge the vial at 4ºC before opening to recover the entire contents.

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Optional requirements on this protein +Expand
C-fusion   N-fusion  Non-tagged
His   GST  Fc  Others
<1.0 eu/μg   <0.1 eu/μg  <0.01 eu/μg  Not required
Monomer Isolation   Dimer Isolation   Not required
>80% by SDS-PAGE   >90% by SDS-PAGE  >95% by SDS-PAGE  Others
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45-1 Ramsey Road, Shirley, NY 11967, USA
USA: 1-631-559-9269  1-631-448-7888
Europe: 44-207-048-3343
FAX: 1-631-938-8127

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