Molecular Weight：Approximately 15.8 kDa, a single non-glycosylated polypeptide chain containing 141 amino acids.
Accession：Q6EBC2
Biological Activity：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.
Purity：> 97 % by SDS-PAGE and HPLC analyses.
Formulation：Lyophilized from a 0.2 µm filtered concentrated solution in PBS, pH7.4.
