Programmed cell death protein 1, commonly referred to as PD-1 or CD279, plays a crucial role in modulating the immune system's response to the body's own cells. It achieves this by dampening the immune response and fostering self-tolerance, primarily through the inhibition of T cell inflammatory activity. This protein is present on the surface of certain cells and is instrumental in maintaining immune homeostasis.

KACTUS offers various recombinant PD-1 protein products, including multiple species (human, mouse, cynomolgus, and canine), and multiple tags (hFc, His, mFc, hFc-Avi, His-Avi). Our PD-1 proteins are expressed in HEK293 cells.


Programmed cell death protein 1, CD279, hPD-1, PDCD1, Programmed Cell Death 1, Systemic Lupus Erythematosus Susceptibility 2, Protein PD-1, PD1, Programmed Cell Death 1 Protein, CD279 Antigen, HPD-L, HSLE1, SLEB2, PD-1, Programmed Cell Death 1 Receptor

Available Products

Performance Validation



Mouse PD-L1, His Tag captured on CM5 Chip via anti-his antibody can bind Biotinylated Mouse PD-1, hFc Tag with an affinity constant of 3.35 uM as determined in SPR assay (Biacore T200).

Immobilized Canine PD-1, hFc Tag at 1ug/ml (100ul/well) on the plate. Dose response curve for Human PD-L1, mFc Tag with the EC50 of 30.7ng/ml determined by ELISA (QC Test).

Request a Quote

Quality Control

KACTUS products are validated for purity and bioactivity using analytical techniques such as Bis-Tris, HPLC, ELISA, and SPR. Our proteins are designed and manufactured in-house using our SAMS protein engineering platform and high-standard manufacturing facilities.

Process Validation

We monitor the entire production process to ensure expression conditions are optimal for that specific protein. This includes monitoring (1) growth of host cells, (2) expression of the target gene, and (3) purification of the recombinant protein. Moreover, we've optimized the expression process to minimize the presence of contaminants that can affect the purity or activity of the final product.

Analytical Testing

PURITY KACTUS ensures the purity of each recombinant protein using HPLC and Bis-Tris Page. Additionally, we quantify the level of impurities, such as host cell proteins, endotoxin, and host cell DNA in the final product. 

ACTIVITY We analyze the potency of our recombinant proteins by measuring in vitro activity, such as its ability to bind to its target molecule via ELISA or SPR assay. 

CONSISTENCY Our team tests for batch-to-batch consistency to ensure stable bioactivity across lots. Additionally, we assess stability of our proteins by measuring degradation over time and resistance to environmental stress factors, such as temperature and pH changes.

Request a Test Sample

Recently viewed