KIR3DS1/CD158e2, located on NK cells, serves as a receptor for MHC class I molecules. Its crucial role includes triggering NK cell degranulation and inducing the production of anti-viral cytokines upon interaction with the peptide-free HLA-F open conformer. This direct engagement highlights KIR3DS1/CD158e2 as a key modulator of NK cell responses, particularly in anti-viral immune reactions. KIR3DS1/CD158e2 Protein, Human (CHO, His) is the recombinant human-derived KIR3DS1/CD158e2 protein, expressed by CHO , with tag free.