Recombinant Human/Cynomolgus/Rhesus macaque CD28 protein, C-His Tag

Product Description

Cat

IMP-124

Official Symbol

CD28

Product Overview

Recombinant Human/Cynomolgus/Rhesus macaque CD28 protein(AA Asn 19-Pro 152)(Accession # P10747-1) is expressed from human 293 cells (HEK293). In the region Asn 19-Pro 152, the AA sequence of Human, Cynomolgus and Rhesus macaque CD28 are homologus. This protein carries a polyhistidine tag at the C-terminus.

Expression System

HEK293

Species

Human/Cynomolgus/Rhesus macaque

Tag

C-His Tag

Form

Lyophilized from sterile PBS, pH7.4, 10% trehalose.

Molecular Mass

This protein carries a polyhistidine tag at the C-terminus. The protein has a calculated MW of 17.0 kDa. The protein migrates as 30-42 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

Protein length

Asn 19-Pro 152

Endotoxin

Less than 1.0 EU per ug by the LAL method.

Purity

>90% as determined by SDS-PAGE.

Storage

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: -20°C to -70°C for 12 months in lyophilized state; -70°C for 3 months under sterile conditions after reconstitution.

Reconstitution

It is recommended that sterile water be added to the vial to prepare a stock solution of 0.2 mg/ml. Centrifuge the vial at 4ºC before opening to recover the entire contents.

SDS-PAGE

Human / Cynomolgus / Rhesus macaque CD28, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 90%.

SEC-MALS 1

The purity of Human / Cynomolgus / Rhesus macaque CD28, His Tag was more than 90% and the molecular weight of this protein is around 55-65 kDa verified by SEC-MALS.

Bioactivity-ELISA 1

Immobilized Monoclonal Anti-Human CD28 Antibody, Mouse IgG1 at 5 ug/mL (100 uL/well) can bind Human / Cynomolgus / Rhesus macaque CD28, His Tag with a linear range of 0.1-1 ng/mL (QC tested).

Bioactivity-BLI 1

Loaded Human B7-1, Fc Tag (HPLC-verified) on Protein A Biosensor, can bind Human / Cynomolgus / Rhesus macaque CD28, His Tag with an affinity constant of 5.1 uM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

Bioactivity-BLI 2

Loaded Human B7-2, Fc Tag on Protein A Biosensor, can bind Human / Cynomolgus / Rhesus macaque CD28, His Tag with an affinity constant of 4.5 uM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

Bioactivity-BLI 3

Loaded Monoclonal Anti-Human CD28 Antibody, Mouse IgG1 on AMC Biosensor, can bind Human / Cynomolgus / Rhesus macaque CD28, His Tag with an affinity constant of 0.169 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

Data Sheet MSDS

Datasheet MSDS

For research or industrial raw materials, not for personal medical use!

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