分子别名（Synonym）
PD-L1,CD274,B7-H1,PDCD1L1,PDCD1LG1
表达区间及表达系统（Source）
Mouse PD-L1, His Tag (PD1-M5220) is expressed from human 293 cells (HEK293). It contains AA Phe 19 - Thr 238 (Accession # NP_068693).
Predicted N-terminus: Phe 19
蛋白结构（Molecular Characterization）
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 26.6 kDa. The protein migrates as 40-50 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
纯度（Purity）
>95% as determined by SDS-PAGE.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
Contact us for customized product form or formulation.
重构方法（Reconstitution）
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
存储（Storage）
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 3 months under sterile conditions after reconstitution.
电泳（SDS-PAGE）
Mouse PD-L1, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.
活性（Bioactivity）-SPR
Captured Mouse PD-1, Fc Tag (Cat. No. PD1-M5259) on Protein A Chip can bind Mouse PD-L1, His Tag (Cat. No. PD1-M5220) with an affinity constant of 2.16 μM as determined in SPR assay (Biacore T200) (Routinely tested).
Protocol
Captured Mouse PD-L1, His Tag (Cat. No. PD1-M5220) on CM5 Chip via Anti-His antibody can bind Mouse PD-1, Fc Tag (Cat. No. PD1-M5259) with an affinity constant of 1.37 μM as determined in SPR assay (Biacore T200) (Routinely tested).
Protocol
活性（Bioactivity）-BLI
Loaded Mouse PD-1, Fc Tag (Cat. No. PD1-M5259) on ProteinA Biosensor, can bind Mouse PD-L1, His Tag (Cat. No. PD1-M5220) with an affinity constant of 1.5 μM as determined in BLI assay (ForteBio Octet Red96e) (QC tested).
Protocol
Report
文献引用（Citations）
Authors: X Qian, et al
Journal: US20190330348A1 43769
Application: ELISA
PD-L1-based cancer vaccine elicits antitumor immunity in a mouse melanoma model
Authors: Z Lin, et al
Journal: Molecular Therapy: Oncolytics 43630
Application: PD-L1 PD-1 Blockade assay （ELISA)
PD-L1 Specific Monoclonal Antibodies for Disease Treatment and Diagnosis
Authors: Wang Aijun, et al.
Journal: US20170355770A1 2017
Application: Immunization
背景（Background）
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.
