| Description : |
Interleukin 4 (IL-4) is a 14-19 kDa glycosylated monomer, belongs to the IL-4/IL-13 family. IL-4 is primarily expressed by Th2 biased CD4+ T cells, mast cells, basophils, and eosinophils. IL-4 is a pleiotropic cytokine that participates in at least several B-cell activation processes as well as of other cell types. It is a co-stimulator of DNA-synthesis. It induces the expression of class II MHC molecules on resting B-cells. It enhances both secretion and cell surface expression of IgE and IgG1. It also regulates the expression of the low affinity Fc receptor for IgE (CD23) on both lymphocytes and monocytes. |
| Source : |
Human cells |
| Species : |
Human |
| Bio-activity : |
The activity was measured by its ability to stimulate the proliferation of human TF-1 cells (human erythroleukemic indicator cell line). |
| Molecular Mass : |
14-19 kDa |
| Endotoxin : |
<0.5 EU/ μg |
| Purity : |
High Purity, >95% by SDS-PAGE |
| Stability : |
Use a manual defrost freezer and avoid repeated freeze-thaw cycles. In general: 12 months from date of receipt, -20 to -80 centigrade as supplied. 1 month, 2 to 8 centigrade under sterile conditions after reconstitution. 3 months, -20 to -80 centigrade under sterile conditions after reconstitution. |
| Storage Buffer : |
Lyophilized from a 0.2 μm filtered solution in PBS without carrier protein |
| Reconstitution : |
Briefly centrifuge the vial before opening. It is recommended to reconstitute the protein in sterile PBS containing 0.1% endotoxin-free recombinant human serum albumin. |
