Description: Cytokine with immunomodulatory activity. May play a role in antiviral immunity. Up-regulates MHC class I antigen expression. Ligand for the heterodimeric class II cytokine receptor composed of IL10RB and IL28RA. The ligand/receptor complex seems to signal through the Jak-STAT pathway. (www.uniprot.org) Produced in E.coli as a single, non-glycosylated, polypeptide chain containing 181 amino acids.