Name: Human CTLA-4/CD152 Protein (CTL-HM241)
Brand: KactusBio
SKU: CTL-HM241-100UG
Price: 124.3 USD
Availability: InStock

Express System: HEK293
Product Tag: C-hFc
Purity: > 95% as determined by Bis-Tris PAGE;> 95% as determined by HPLC
Activity: Immobilized Human B7-1, His Tag at 1ug/ml (100ul/well) on the plate. Dose response curve for Human CTLA-4, hFc Tag with the EC50 of 3.0ng/ml determined by ELISA (QC Test). The affinity constant of 1.1nM as determined in SPR assay (Biacore T200). See testing image for detail.
Amino Acid Range: Lys36-Asp161

Catalog #CTL-HM241

Size

100UG

500UG

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Product Description	Recombinant Human CTLA-4/CD152 Protein is expressed from HEK293 with hFc tag at the C-Terminus.It contains Lys36-Asp161.
Product Background	CTLA-4 (cytotoxic T-lymphocyte-associated protein 4), also known as CD152, is a protein receptor that, functioning as an immune checkpoint, downregulates immune responses.CTLA4 is constitutively expressed in regulatory T cells but only upregulated in conventional T cells after activation – a phenomenon which is particularly notable in cancers. It acts as an "off" switch when bound to CD80 or CD86 on the surface of antigen-presenting cells.
Product Category	Recombinant Protein / Antibody discovery / Immune checkpoint proteins

Protein	CTLA-4/CD152
Synonyms	CTLA4; CD152; ICOS; CELIAC3; GRD4; GSE; ALPS5; IDDM12
Accession	P16410-1
Species	Human
Biotinylated	no
Amino Acid Range	Lys36-Asp161
Molecular Weight	The protein has a predicted MW of 40.1 kDa. Due to glycosylation, the protein migrates to 50-55 kDa based on Bis-Tris PAGE result.
Activity	Immobilized Human B7-1, His Tag at 1ug/ml (100ul/well) on the plate. Dose response curve for Human CTLA-4, hFc Tag with the EC50 of 3.0ng/ml determined by ELISA (QC Test). The affinity constant of 1.1nM as determined in SPR assay (Biacore T200). See testing image for detail.
Product Tag	C-hFc
Expression System	HEK293
Purity	> 95% as determined by Bis-Tris PAGE;> 95% as determined by HPLC
Endotoxin	Less than 1 EU per ug by the LAL method.

Form	Lyophilized
Shipping	Shipped at ambient temperature.
Formulation	Lyophilized from 0.22um filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.
Reconstitution	Dissolve the lyophilized protein in distilled water. It is recommended to resuspend at 0.5 mg/mL if the lyophilized powder is 100 ug or less, at 1mg/ml for 500ug or 1mg lyophilized powder. Do not mix by vortex or vigorous shaking.
Stability And Storage	-20 to -80°C for 12 months as supplied from date of receipt.；-80°C for 3 months after reconstitution.；Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.

	Human B7-1, His Tag captured on CM5 Chip via Anti-His Antibody can bind Human CTLA-4, hFc Tag with an affinity constant of 1.1nM as determined in SPR assay (Biacore T200).
	Immobilized Human B7-1, His Tag at 1ug/ml (100ul/well) on the plate. Dose response curve for Human CTLA-4, hFc Tag with the EC50 of 3.0ng/ml determined by ELISA (QC Test).
	Immobilized Human B7-2, His Tag at 0.5ug/ml (100ul/Well) on the plate. Dose response curve for Human CTLA-4, hFc Tag with the EC50 of 0.12ug/ml determined by ELISA.
	Human CTLA-4 on Bis-Tris PAGE under reduced condition. The purity is greater than 95%.
	The purity of Human CTLA-4 is greater than 95% as determined by SEC-HPLC.