免疫チェックポイント タンパク質

Figure 1. The purity of Human CD27 Ligand, His,Flag Tag (active trimer) (MALS verified) (Cat. No. CDL-H52Da) is more than 95% in HP-SEC, and around 55-70 kDa verified by SEC-MALS.

組換えタンパク質の純度と生物活性の安定性はとても重要です。弊社が作っている全てのタンパク質の純度と生物活性は様々な検証によって確認されています。

Biotinylated Human PD-1 / PDCD1 Protein, Avitag™,His Tag (recommended for biopanning) (MALS verified)（Cat. No. PD1-H82E4）

PD-1&PD-L1 pathway

Immobilized Human PD-1, His Tag (Cat. No. PD1-H5221) at 2 μg/mL (100 μL/well) can bind anti-PD-1 mab with a linear range of 0.1-3 ng/mL (Routinely tested).                  

PD-1&PD-L1 pathway

Serial dilutions of anti-PD-1 mab were added into Human PD-1, Fc Tag, low endotoxin (Cat. No. PD1-H5257): Biotinylated Human PD-L1, Fc, Avitag, His Tag (Cat. No. PD1-H82F3) binding reactions. The half maximal inhibitory concentration (IC50) is 0.5381 μg/mL (Routinely tested).

LAG-3 pathway

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).

LAG-3 pathway

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).

TIGIT pathway

Serial dilutions of Human TIGIT Neutralizing antibody were added into Human TIGIT, Fc Tag (Cat. No. TIT-H5254): Biotinylated Human CD155, Fc,Avitag (Cat. No. CD5-H82F6) binding reactions. The half maximal inhibitory concentration (IC50) is 0.55834 μg/mL (Routinely tested).

CD47&SIPR α pathway(Cell-based assay)

FACS analysis shows that the binding of Human CD47 to ACHN expressing SIRP-a was inhibited by increasing concentration of neutralizing SIRP-a antibody. The concentration of Human CD47 used is 20 μg/mL. IC50=9.334 μg/mL

2細胞機能の検証

4-1BB pathway

Human 4-1BB Ligand (71-254), Fc Tag, active trimer (Cat. No. 41L-H5265) induce IL-8 secretion in HT1080 human CD137 cell line. The EC50 for this effect is 0.079 μg/mL (Routinely tested).

3薬物動態分析−PK分析

CTLA-4 pathway

Immobilized Human CTLA-4, His Tag, active dimer (Cat. No. CT4-H52H9) at 2 μg/mL, add increasing concentrations of CTLA-4 x OX40 Bispecific Antibody in 50% Human serum and then add Biotinylated Human OX40, Avitag, His Tag(Cat. No. TN4-H82E4) at 1 μg/mL. Detection was performed using HRP-conjugated streptavidin with sensitivity of 4 ng/mL (Intact assay, Routinely tested).