A DNA sequence encoding the human CD40 (NP_001241.1) extracellular domain (Met 1-Arg 193) was expressed, with a C-terminal polyhistidine tag.
> 95 % as determined by SDS-PAGE
Lyophilized from sterile PBS, pH 7.4
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.