1. Loaded Human PD-1-Fc on Protein A Biosensor, can bind Human PD-L1-Flag with an affinity constant of 0.19 uM as determined in BLI assay. (Regularly tested) 2. Immobilized Human PD-L1-Flag at 2μg/ml (100 μl/well)can bind Anti-Human PDL1 mAb-Fc. The ED50 of Anti-Human PDL1 mAb-Fc is 14.68 ng/ml. (Regularly tested)

PD-L1 Protein, Human, Recombinant (Flag) is expressed in HEK293 mammalian cells with C-Flag tag. The predicted molecular weight is 35-40 KDa and the accession number is Q9NZQ7.

Human

HEK293 Cells

Programmed Death Ligand 1,Programmed Cell Death 1 Ligand 1,PD-L1,PDL1,PDCD1LG1,PDCD1L1,PDCD1 Ligand 1,CD274,B7-H1,B7H1,B7 Homolog 1

Phe19-Thr239

Phe19-Thr239

Greater than 95% as determined by reducing SDS-PAGE. (QC verified)

Reconstitute the lyophilized protein in distilled water. The product concentration should not be less than 100 μg/ml. Before opening, centrifuge the tube to collect powder at the bottom. After adding the reconstitution buffer, avoid vortexing or pipetting for mixing.

Lyophilized powders can be stably stored for over 12 months, while liquid products can be stored for 6-12 months at -80°C. For reconstituted protein solutions, the solution can be stored at -20°C to -80°C for at least 3 months. Please avoid multiple freeze-thaw cycles and store products in aliquots.

CD274, also known as B7-H1 or programmed death ligand 1 (PD-L1), is a 40 kD type I transmembrane protein and a member of the B7 family within the immunoglobulin receptor superfamily. Programmed death-1 ligand-1 (PD-L1, CD274, B7-H1) has been identified as the ligand for the immunoinhibitory receptor programmed death-1(PD1/PDCD1) and has been demonstrated to play a role in the regulation of immune responses and peripheral tolerance. By binding to PD1 on activated T-cells and B-cells, PD-L1 may inhibit ongoing T-cell responses by inducing apoptosis and arresting cell-cycle progression. Accordingly, it leads to growth of immunogenic tumor growth by increasing apoptosis of antigen specific T cells and may contribute to immune evasion by cancers. PD-L1 thus is regarded as promising therapeutic target for human autoimmune disease and malignant cancers.