Recombinant Cynomolgus PD-L1 Protein (His Tag)

Collections: Antibody / cell therapy targets, Antibody therapeutic / adc target proteins, Car-nk targets proteins, Co-inhibitory receptors, Featured immune checkpoint protein molecules, Immune checkpoint proteins, Recombinant proteins

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Product Overview

Tag	His
Host Species	Cynomolgus
Accession	XP_015292694.1
Synonym	PD-L1 Programmed Cell Death 1 Ligand 1; PD-L1; PDCD1 ligand 1; Programmed death ligand 1; B7 homolog 1; B7-H1; CD274; B7H1; PDCD1L1; PDCD1LG1; PDL1
Background	CD274, also known as B7-H1 or programmed death ligand 1 (PD-L1), is a 40 kD type I transmembrane protein and a member of the B7 family within the immunoglobulin receptor superfamily. Programmed death-1 ligand-1 (PD-L1, CD274, B7-H1) has been identified as the ligand for the immunoinhibitory receptor programmed death-1(PD1/PDCD1) and has been demonstrated to play a role in the regulation of immune responses and peripheral tolerance. By binding to PD1 on activated T-cells and B-cells, PD-L1 may inhibit ongoing T-cell responses by inducing apoptosis and arresting cell-cycle progression. Accordingly, it leads to growth of immunogenic tumor growth by increasing apoptosis of antigen specific T cells and may contribute to immune evasion by cancers. PD-L1 thus is regarded as promising therapeutic target for human autoimmune disease and malignant cancers.
Description	A DNA sequence encoding the cynomolgus/rhesus CD274 (XP_015292694.1) (Met1-Thr239) was produced with a His tag at the C-terminus. Cynomolgus and Rhesus CD274 sequences are identical.
Source	HEK293
Predicted N Terminal	Phe 19
AA Sequence	Met1-Thr239
Molecular Weight	The recombinant cynomolgus/rhesus CD274 comprises 232 amino acids and has a calculated molecular mass of 26.7 KDa.
Purity	Greater than 95% as determined by SDS-PAGE
Endotoxin	< 1.0 EU per μg of the protein as determined by the LAL method
Bioactivity	Measured by its binding ability in a functional ELISA.Immobilized Cynomolgus CD274-His at 10 ug/ml (100 ul/well) can bind Cynomolgus PDCD1-Fc, The EC50 of Cynomolgus PDCD1-Fc is 1.0-2.3ug/ml.
Formulation	Lyophilized from sterile PBS, pH 7.4.
Stability	Recombinnat Proteins are stable for up to 1 year from date of receipt at -70°C
Usage	For Research Use Only

FAQs

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.