Description: Cytokine. Inhibits inflammatory cytokine production. Synergizes with IL2 in regulating interferon-gamma synthesis. May be critical in regulating inflammatory and immune responses. (www.uniprot.org) Produced in E.coli as a single, non-glycosylated, polypeptide chain containing 112 amino acids (fragment 21-132) with an amino-terminal hexahistidine tag.