Purity: > 95% by SDS - PAGE Format: Liquid. In Phosphate Buffered Saline (pH 7.4) containing 10% glycerol.. CD274, also known as programmed cell death 1 ligand 1 isoform, is a member of the growing B7 family of immune molecules. This protein is involved in the regulation of cellular and humoral immune responses. It suppresses T cell activation and proliferation and induces the apoptosis of activated T cells. Also, it plays a role in the development of immune tolerance by promoting T cell anergy and enhancing regulatory T cell development. Recombinant human CD274, fused to hIgG-His-tag at C-terminus, was expressed in insect cell and purified by using conventional chromatography techniques.