Recombinant Human Interleukin-31(rHu IL-31)

• Source:

  Escherichia coli.

• Purity:

  > 97 % by SDS-PAGE and HPLC analyses.

• Bioactivity:

  Fully biologically active when compared to standard. The specific activity is determined by inducing STAT3 activation using human U-87 MG cells. 5 ng/mL of rHuIL-31 can effectively induce STAT3 activation.

• Molecular Weight:

  Approximately 15.8 kDa, a single non-glycosylated polypeptide chain containing 141 amino acids.

• Storage Conditions:

  This lyophilized preparation is stable at 2-8 °C, but should be kept at -20 °C for long term storage, preferably desiccated. Upon reconstitution, the preparation is stable for up to one week at 2-8 °C. For maximal stability, apportion the reconstituted preparation into working aliquots and store at -20 °C to -70 °C. Avoid repeated freeze/thaw cycles.

• Formulation:

  Lyophilized from a 0.2 µm filtered concentrated solution in PBS, pH7.4.

• CAS Number:

  9000-83-3