Human ICOS / CD278 (C136S, C137S) Protein, His Tag, active dimer (MALS verified)

Inducible T-cell costimulator (ICOS) is also known as Activation-inducible lymphocyte immunomediatory molecule (AILIM), CD278, which belongs to the CD28 family of immune costimulatory receptors consisting of CD28, CTLA-4 and PD-1. ICOS enhances all basic T-cell responses to a foreign antigen, namely proliferation, secretion of lymphokines, up-regulation of molecules that mediate cell-cell interaction, and effective help for antibody secretion by B-cells. CD278 / ICOS prevents the apoptosis of pre-activated T-cells and also plays a critical role in CD40-mediated class switching of immunoglobin isotypes.

Product Specifications

Background

Specifications

This protein carries a polyhistidine tag at the C-terminus. The protein has a calculated MW of 19.1 kDa. The protein migrates as 28-33 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.

Accession Number

Q9Y6W8-1 (C136S, C137S)

Expression Region

Glu 21 - Phe 141

Host

HEK293

Target

ICOS

Conjugation

Unconjugated

Tag

C-10xHis & C-10xHis

Source

Human

Stability

-20°C to -70°C for 12 months in lyophilized state; -70°C for 3 months under sterile conditions after reconstitution. For long term storage, the product should be stored at lyophilized state at -20°C or lower.

Endotoxin

1.0 EU per μg

Purity

90%

Bioactivity

Immobilized Human ICOS Protein, His Tag (Cat. No. ICS-H52Ha) at 5 μg/mL (100 μL/well) can bind Human B7-H2, Fc Tag (Cat. No. B72-H5254) with a linear range of 0.1-2 ng/mL (QC tested).