IL5 (Interleukin 5, E-CSF, ESGF, EDF, TRF, Colony-Stimulating Factor, Eosinophil, T-Cell replacing Factor, B Cell Differentiation Factor I, Eosinophil Differentiation Factor)

IL-5 is secreted by a restricted number of mesenchymal cell types. In its native state, mature IL-5 is synthesized as a 115aa, highly glycosylated 22kD monomer that forms a 40-50kD disulfide-linked homodimer. Although the content of  carbohydrate  is  high, carbohydrate is not needed for bioactivity. Monomeric IL-5 has no activity and requires a homodimer for function, which is in contrast to the receptor-related IL-3 and GM-CSF cytokines that exist only as monomers.  Just as one IL-3 and GM-CSF monomer binds to one receptor, one IL-5 homodimer is able to engage only one IL-5 receptor.  It has been suggested that IL-5 (as a dimmer) undergoes a general conformational change after binding to one receptor molecule and this change precludes binding to a second receptor.

Applications:
Suitable for use in ELISA, Western Blot, Immunohistochemistry, Immunocytochemistry. Other applications not tested.

Recommended Dilution:
Western Blot: 1:50-400
Immunocytochemistry: 1:50-500
Immunohistochemistry (frozen): 1:50-500
Immunohistochemistry (paraffin): 1:10-100
ELISA: 1:100-1:5000
Optimal dilutions to be determined by the researcher.

Storage and Stability:
May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.