Human PD-L1, Mouse IgG1 Fc Tag, low endotoxin (PD1-H52A3) is expressed from human 293 cells (HEK293). It contains AA Phe 19 - Arg 238 (Accession # NP_054862.1).
Predicted N-terminus: Phe 19
This protein carries a mouse IgG1 Fc tag at the C-terminus.
The protein has a calculated MW of 51.4 kDa. The protein migrates as 55-65 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
Less than 0.1 EU per μg by the LAL method.
>95% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
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Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 6 months under sterile conditions after reconstitution.
Human PD-L1, Mouse IgG1 Fc Tag, low endotoxin on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.
The purity of Human PD-L1, Mouse IgG1 Fc Tag, low endotoxin (Cat. No. PD1-H52A3) was more than 90% and the molecular weight of this protein is around 115-135 kDa verified by SEC-MALS.
Immobilized Human PD-1, Strep Tag (Cat. No. PD1-H5284) at 1 μg/mL (100 μL/well) can bind Human PD-L1, Mouse IgG1 Fc Tag, low endotoxin (Cat. No. PD1-H52A3) with a linear range of 5-78 ng/mL (QC tested).
Serial dilutions of Nivolumab were added into Human PD-L1, Mouse IgG1 Fc Tag, low endotoxin (Cat. No. PD1-H52A3): Human PD-1, Strep Tag (Cat. No. PD1-H5284) binding reactions. The half maximal inhibitory concentration (IC50) is 0.2391 μg/mL (QC tested).
Authors: Tocheva, Anna S et al.
Journal: Current protocols in immunology vol 2020
Application: Flow cytometry
Programmed cell death 1 ligand 1 (PD-L1) is also known as cluster of differentiation (CD274) or B7 homolog 1 (B7-H1), is a member of the growing B7 family of immune molecules and is involved in the regulation of cellular and humoral immune responses. B7-H1 is a cell surface immunoglobulin superfamily with two Ig-like domains within the extracellular region and a short cytoplasmic domain. PD-L1 is highly expressed in the heart, skeletal muscle, placenta and lung and weakly expressed in the thymus, spleen, kidney and liver. PD-L1 is expressed on activated T-cells, B-cells, dendritic cells, keratinocytes and monocytes. PD-L1 is up-regulated on T- and B-cells, dendritic cells, keratinocytes and monocytes after LPS and IFNG activation and up-regulated in B-cells activated by surface Ig cross-linking. PD-L1 involve in the costimulatory signal, essential for T-cell proliferation and production of IL10 and IFNG, in an IL2-dependent and a PDCD1-independent manner.