Recombinant Human CTLA-4 Protein

Name: Recombinant Human CTLA-4 Protein
Brand: Beta LifeScience
SKU: BL-0440PS
Availability: InStock

Collections: Antibody / cell therapy targets, Antibody therapeutic / adc target proteins, Co-inhibitory receptors, Cytokines and growth factors, Other cytokines, Recombinant proteins

Our products are highly customizable to meet your specific needs. You can choose options such as endotoxin removal, liquid or lyophilized forms, preferred tags, and the desired functional sequence range for proteins. Submitting a written inquiry expedites the quoting process.

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Product Overview

Tag	His
Host Species	Human
Synonym	CytotoxicT-Lymphocyte Associated Protein 4, Cytotoxic T-Lymphocyte-Associated Protein 4,Insulin-Dependent Diabetes Mellitus 12, Celiac Disease 3, CTLA-4, CD152, LigandAnd Transmembrane Spliced Cytotoxic T Lymphocyte Associated Antigen 4, CytotoxicT Lymphocyte Associated Antigen 4 Short Spliced Form, CytotoxicT-Lymphocyte-Associated Serine Esterase-4, Cytotoxic T-Lymphocyte-AssociatedAntigen 4, CD152 Isoform, CD152 Antigen, CELIAC3, IDDM12, ALPS5, GRD4, GSE, CD,Cytotoxic T-lymphocyte protein 4, CTLA4.
Background	CTLA-4 is a member of the immunoglobulin superfamily and encodes a protein which transmits an inhibitory signal to T cells. The protein contains a V domain, a transmembrane domain, and a cytoplasmic tail. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. The membrane-bound isoform functions as a homodimer interconnected by a disulfide bond, while the soluble isoform functions as a monomer. Mutations in this gene have been associated with insulin-dependent diabetes mellitus, Graves disease, Hashimoto thyroiditis, celiac disease, systemic lupus erythematosus, thyroid-associated orbitopathy, and other autoimmune diseases.
Description	CTLA4 expressed in Sf9 Baculovirus cells is a single, glycosylated polypeptide chain containing 135a.a. (36-161a.a.) and having a molecular weight of 14.6kDa (Molecular size on SDS-PAGE will appear at approximately 18-28kDa). CTLA4 is expressed with a6a.a. His tag at C-Terminus and purified by unique purification methods.
Source	Sf9
AA Sequence	ADLKAMHVAQPAVVLASSRG IASFVCEYAS PGKATEVRVT VLRQADSQVT EVCAATYMMG NELTFLDDSI CTGTSSGNQVNLTIQGLRAM DTGLYICKVE LMYPPPYYLG IGNGTQIYVI DPEPCPDSDH HHHHH.
Purity	>90% as determined by SDS-PAGE.
Endotoxin	<1.0 EU per μg by the LAL method.
Formulation	CTLA4 protein solution (0.25mg/ml) contains PhosphateBuffered Saline (pH 7.4) and 20% glycerol.
Stability	Recombinant protein is stable for 12 months at -70°C
Usage	For Research Use Only
Storage	Store at 4°C if entire vial will be used within 2-4 weeks. Store, frozen at -20°C for longer periods of time. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).Avoid multiple freeze-thaw cycles.

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.