Recombinant Protein. Human IL-38 aa 20-152 is fused at the C-terminus to the Fc portion of human IgG1 Knobs-into-Holes technology see reference J.B. Ridgway, et al. Protein Eng. 9, 617 1996. Source HEK 293 cells. Lyophilized. Contains PBS. IL-38 IL-1F10 belongs to the IL-1 family of proteins. IL-38 is expressed in heart, placenta, fetal liver, spleen, thymus and tonsil. The expression in a variety of immune tissues and similarity to IL-1Ra suggest a role of IL-38 in the inflammatory response. It has been reported that removal of the N-terminus domain of the interleukins of the IL-1F family such as IL-1F5 / 6 / 8 or 9 also called IL-36Ra, IL-36alpha, IL-36beta or IL-36gamma is important to increase their biological activity. Recently it has been shown that IL-38 is N-terminally processed and secreted by apoptotic cells.