IFN-alpha 2a/IFNA2 Protein, Human (His) Reference: HY-P701095 IFN-alpha 2 (IFNA2), belongs to type I interferon family, is a protein secreted by cells infected by a virus and acting on other cells to inhibit viral infection. IFN-alpha 2 exerts cytotoxic activity against CD8+ T cells and induces CD4+ T cell depletion. IFN-alpha 2a/IFNA2 Protein, Human contains 165 a.a., is produced in E. coli with tag free.