Name: Human B7-1/CD80 Protein (B71-HM280)
Brand: KactusBio
SKU: B71-HM280-100UG
Price: 264.0 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 CTLA-4, His Tag at 0.5ug/ml (100ul/well) on the plate. Dose response curve for Human B7-1, hFc Tag with the EC50 of 21.4ng/ml determined by ELISA (QC Test). The affinity constant of 43.61 uM as determined in SPR assay (Biacore T200). See testing image for detail.
Amino Acid Range: Val35-Asn242

Catalog #B71-HM280

Size

100UG

500UG

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Product Description	Recombinant Human B7-1/CD80 Protein is expressed from HEK293 with hFc tag at the C-Terminus.It contains Val35-Asn242.
Product Background	Cluster of differentiation 80 (also CD80 and B7-1) is a protein found on dendritic cells, activated B cells and monocytes that provides a costimulatory signal necessary for T cell activation and survival. It is the ligand for two different proteins on the T cell surface: CD28 and CTLA-4.
Product Category	Recombinant Protein / Antibody discovery / Immune checkpoint proteins

Protein	B7-1/CD80
Synonyms	CD80 molecule; B7; B71; B7-1; BB1; CD28LG1; CD80; B7.1; CD28LG1; LAB7
Accession	P33681-1
Species	Human
Biotinylated	no
Amino Acid Range	Val35-Asn242
Molecular Weight	The protein has a predicted MW of 50.5 kDa. Due to glycosylation, the protein migrates to 70-80 kDa based on Bis-Tris PAGE result.
Activity	Immobilized Human CTLA-4, His Tag at 0.5ug/ml (100ul/well) on the plate. Dose response curve for Human B7-1, hFc Tag with the EC50 of 21.4ng/ml determined by ELISA (QC Test). The affinity constant of 43.61 uM 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, hFc Tag captured on CM5 Chip via Protein A can bind Human/Cynomolgus/Rhesus macaque CD28, His-Avi Tag with an affinity constant of 43.61 uM as determined in SPR assay (Biacore T200).
	Immobilized Human CTLA-4, His Tag at 0.5ug/ml (100ul/well) on the plate. Dose response curve for Human B7-1, hFc Tag with the EC50 of 21.4ng/ml determined by ELISA (QC Test).
	Human B7-1 on Bis-Tris PAGE under reduced condition. The purity is greater than 95%.
	The purity of Human B7-1 is greater than 95% as determined by SEC-HPLC.