IMP-7422

CD274

Purified recombinant protein of Homo sapiens programmed cell death 1 ligand 1(PD-L1/CD274), transcript variant 1, extracellular domain residue (19-238aa) with C-terminal DDK tag, expressed and secreted from insect sf9 cells.

This gene encodes an immune inhibitory receptor ligand that is expressed by hematopoietic and non-hematopoietic cells, such as T cells and B cells and various types of tumor cells. The encoded protein is a type I transmembrane protein that has immunoglobulin V-like and C-like domains. Interaction of this ligand with its receptor inhibits T-cell activation and cytokine production. During infection or inflammation of normal tissue, this interaction is important for preventing autoimmunity by maintaining homeostasis of the immune response. In tumor microenvironments, this interaction provides an immune escape for tumor cells through cytotoxic T-cell inactivation. Expression of this gene in tumor cells is considered to be prognostic in many types of human malignancies, including colon cancer and renal cell carcinoma. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2015]

Insect cells

Human

C-DDK

50mM Tris-HCl pH 8.0, 100mM glycine, 10% glycerol

25.2 kDa

Met-Phe19-Arg238

> 80% as determined by SDS-PAGE and Coomassie blue staining.

Store at -80 centigrade.
Stability: Stable for 12 months from the date of receipt of the product under proper storage and handling conditions. Avoid repeated freeze-thaw cycles.

> 50 μg/mL as determined by microplate BCA method.