The IL-17A protein is an important effector cytokine that is critical in both innate and adaptive immunity to defend against microorganisms and maintain tissue integrity. It acts through the IL17RA-IL17RC heterodimeric receptor complex, triggering signaling pathways, activating immune-related gene transcription and promoting strong immune inflammation. Animal-Free IL-17A Protein, Human (His) is the recombinant human-derived animal-FreeIL-17A protein, expressed by E. coli , with C-His labeled tag. This product is for cell culture use only.