分子别名（Synonym）
LAG3,CD223,FDC
表达区间及表达系统（Source）
Human LAG-3, His Tag (LA3-H5222) is expressed from human 293 cells (HEK293). It contains AA Leu 23 - Leu 450 (Accession # P18627-1).
Predicted N-terminus: Leu 23
蛋白结构（Molecular Characterization）
This protein carries a polyhistidine tag at the C-terminus, and has a calculated MW of 47.1 kDa. The predicted N-terminus is Leu 23. The reducing (R) protein migrates as 55-60 kDa in SDS-PAGE due to glycosylation.
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
纯度（Purity）
>90% 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）
Human LAG-3, 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 90%.
获取HPLC数据
活性（Bioactivity）-ELISA
Immobilized Anti-Human LAG3 MAb, Human IgG1 at 2μg/mL (100 μL/well) can bind Human LAG-3, His Tag (Cat. No. LA3-H5222) with a linear range of 1-6 ng/mL (QC tested).
Protocol
Report
活性（Bioactivity）-SPR
Anti-LAG-3 MAb (Human IgG1) captured on CM5 chip via Anti-Human IgG Fc antibodies surface, can bind Human LAG-3, His Tag (Cat. No. LA3-H5222) with an affinity constant of 4.57 nM as determined in a SPR assay (Biacore T200) (Routinely tested).
Protocol
活性（Bioactivity）-BLI
Loaded Anti-LAG-3 MAb (Human IgG1) on AHC Biosensor, can bind Human LAG-3, His Tag (Cat. No. LA3-H5222) with an affinity constant of 7.47 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
文献引用（Citations）
-
Anti-LAG-3 antibodies and methods of use thereof
Authors: NS Wilson, DA Savitsky, SM Jennings
Journal: US10844119B2 2020
Application: Flow cytometry
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Authors: R Stafford, et al
Journal: US20190330336A1 43768
Application: ELISA
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Authors: X Yu, et al
Journal: MAbs 43642
Application: Biopanning
-
Novel fusion polypeptide specific for Lag-3 and PD-1
Authors: C Rothe, et al
Journal: US20190010231A1 43475
Application: ELISA
背景（Background）
Lymphocyte activation gene 3 protein (LAG3) is also known as CD antigen CD223 and protein FDC, which belongs to immunoglobulin (Ig) superfamily and contains 4 extracellular Ig-like domains. The LAG3 gene contains 8 exons. The sequence data, exon/intron organization, and chromosomal localization all indicate a close relationship of LAG3 to CD4. LAG3 /CD223 involved in lymphocyte activation. LAG3 /CD223 binds to HLA class-II antigens.
