CTL-HM401B-100μg / 询价
CTL-HM401B-500μg / 询价
CTL-HM401B-500μgx2 / 询价
Biotinylated Human CTLA-4/CD152 Protein
Recombinant Biotinylated Human CTLA-4 Protein is expressed from HEK293 with His tag and Avi tag at the C-Terminus. It contains Lys36-Asp161.[Accession | P16410]
The protein has a predicted MW of 16.3 kDa. Due to glycosylation, the protein migrates to 25-30 kDa based on Tris-Bis PAGE result.
Less than 1EU per μg by the LAL method.
> 95% as determined by Tris-Bis PAGE
> 95% as determined by HPLC
Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.
Centrifuge the tube before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.
-20 to -80°C for 12 months as supplied from date of receipt.
-80°C for 3-6 months after reconstitution.
2-8°C for 2-7 days after reconstitution.
Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.
Biotinylated Human CTLA-4 on Tris-Bis PAGE under reduced condition. The purity is greater than 95%.
The purity of Biotinylated Human CTLA-4 is greater than 95% as determined by SEC-HPLC.
Immobilized Biotinylated Human CTLA-4, His Tag at 1μg/ml (100μl/well) on the streptavidin precoated plate (5μg/ml). Dose response curve for Human B7-1, hFc Tag with the EC50 of 2.4ng/ml determined by ELISA (QC Test).
Immobilized Anti-CTLA-4 Antibody, hFc Tag at 1μg/ml (100μl/well) on the plate. Dose response curve for Biotinylated Human CTLA-4, His Tag with the EC50 of 45.7ng/ml determined by ELISA.
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.
CTLA4; CD152; ICOS; CELIAC3; GRD4; GSE; ALPS5; IDDM12
(1)Merwe V D , P. A. CD80 (B7-1) Binds Both CD28 and CTLA-4 with a Low Affinity and Very Fast Kinetics[J]. Journal of Experimental Medicine, 1997, 185(3):393-404.
