DescriptionMeasured in a cell proliferation assay using TF-1 human erythroleukemic cells. Kitamura, T. et al. (1989) J. Cell Physiol. 140:323. The ED50 for this effect is 0.05-0.2 ng/mL.
|M.W. (Observed): 17-25 kDa, reducing conditions; M.W. (theoretical): 15.0 kDa|
|>95%, by SDS-PAGE under reducing conditions and visualized by silver stain.|
|Chinese Hamster Ovary cell line, CHO-derived human IL-4 protein His25-Ser153|
|Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20°C to -70°C as supplied. 1 month, 2°C to 8°C under sterile conditions after reconstitution. 3 months, -20°C to -70°C under sterile conditions after reconstitution.|
|Lyophilized from a 0.2 µm filtered solution in PBS.|
|<0.01 EU per 1 µg of the protein by the LAL method.|
|B cell growth factor 1, BCDF, B-cell stimulatory factor 1, BCGF1, BCGF-1, binetrakin, BSF1, BSF-1, IL4, IL-4B_cell stimulatory factor 1, interleukin 4, interleukin-4, Lymphocyte stimulatory factor 1, MGC79402, Pitrakinra|
|Reconstitute at 100 µg/mL in PBS.|
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