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This protein carries a human IgG1 Fc tag at the C-terminus.
The protein has a calculated MW of 39.9 kDa. The protein migrates as 45-55 kDa under reducing (R) condition, and 90 kDa under non-reducing (NR) condition (SDS-PAGE) due to glycosylation.
>98% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.
Lyophilized from 0.22 μm filtered solution in Tris with Glycine, Arginine and NaCl, pH7.5 with trehalose as protectant.
Contact us for customized product form or formulation.
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
Human CTLA-4, Fc Tag on SDS-PAGE under reducing (R) and non-reducing (NR) conditions. The gel was stained with Coomassie Blue. The purity of the protein is greater than 98%.
The purity of Human CTLA-4, Fc Tag (Cat. No. CT4-H5255) is more than 90% and the molecular weight of this protein is around 82-100 kDa verified by SEC-MALS.
Immobilized Human B7-2, His Tag (Cat. No. CD6-H5223) at 10 μg/mL (100 μL/well) can bind Human CTLA-4, Fc Tag (Cat. No. CT4-H5255) with a linear range of 2-78 ng/mL (QC tested).
Immobilized Human CTLA-4, Fc Tag (Cat. No. CT4-H5255) at 10 μg/mL (100 μL/well) can bind Human B7-1, His Tag (Cat. No. B71-H5228) with a linear range of 0.156-1.25 μg/mL (Routinely tested).
Serial dilutions of Ipilimumab were added into Human CTLA-4, Fc Tag (Cat. No. CT4-H5255): Biotinylated Human B7-1, Fc,Avitag (Cat. No. B71-H82F2) binding reactions. The half maximal inhibitory concentration (IC50) is 0.8260 μg/mL (Routinely tested).
Serial dilutions of Ipilimumab were added into Human CTLA-4, Fc Tag (Cat. No. CT4-H5255): Biotinylated Human B7-2, Fc,Avitag, premium grade (Cat. No. CD6-H82F5) binding reactions. The half maximal inhibitory concentration (IC50) is 0.1701 μg/mL (Routinely tested).
Loaded Human CTLA-4, Fc Tag (Cat. No. CT4-H5255) on Protein A Biosensor, can bind Human B7-1, His Tag (Cat. No. B71-H5228) with an affinity constant of 0.52 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Loaded Human CTLA-4, Fc Tag (Cat. No. CT4-H5255) on Protein A Biosensor, can bind Human B7-2, His Tag (Cat. No. CD6-H5223) with an affinity constant of 1.9 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
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