Interleukin-4 (IL-4), bovine recombinant (rbIL-4)

Interleukin 4 (IL-4) plays an important role in the immune response. This cytokine promotes Th2 cell development and is essential for the induction of B-cell isotype switching to IgE antibody production. Source: Recombinant protein expressed in pichia pastoris, Biological Activity: IL-4 has an ED50 in the range 20-50 ng/ml determined by measuring the effect of recombinant equine IL-4 on the proliferation of TF-1 cells., , Applications:, Suitable for use in ELISA and In vitro applications. Other applications not tested. Endotoxin Level: <0.01EU/ug. Storage and Stability: May be stored at 4°C for short-term only. For long-term storage, store at -20°C. Aliquots are stable for at least 6 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.