A DNA sequence encoding the mature form of human IL4 isoform 1 (P05112-1) (His25-Ser153) was expressed and purified, with an initial Met.
> 95 % as determined by SDS-PAGE
Lyophilized from sterile 50 mM Tris, 300 mM NaCl, pH 7.0.
In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature. Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.