IL7 is a secreted cytokine of the hemopoietin family that primarily affects early B and T cells and plays an important role in stimulating the proliferation of lymphoid progenitors. IL7 is produced by stromal epithelial cells of the thymus, bone marrow, and intestines. Human and murine IL7 share 60% sequence homology at the primary level and known to exhibit cross species activity. Designated CD127, the human IL7 receptor is a strongly glycosylated membrane protein of 76 kDa. Recombinant Human IL7 is a 17.7 kDa, non-glycosylated protein.
Alternative Names
IL-7
Quantity
100 µg
Regulatory
RUO
Source
E. coli
Host
Human
Endotoxin Level
<1.0 EU/μg of recombinant protein as determined by the LAL method
Biological Activity Comment
The ED50 as determined by dose-dependent stimulation of mouse lymphoma was <0.5ng/ml
Weight
17.7 kDa
Description
A quick spin of the vial followed by reconstitution in distilled water to a concentration not less than 0.1 mg/mL. This solution can then be diluted into other buffers.
Format
Lyophilized PowderLyophilized from a 0.2 μm filtered solution in sodium phosphate and NaCl
Purity
>95% as determined by SDS-PAGE
Storage
The lyophilized protein is stable for at least one year from date of receipt at -70°C. Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months, with a carrier protein without detectable loss of activity. Avoid repeated freeze/thaw cycles.