Biotinylated Human B7-H7 / HHLA2 Protein, His, Avitag™ (MALS verified)

B7-H7 (HHLA2) is a newly identified B7 family member that regulates human T-cell functions. B7-H7 was previously known as human endogenous retrovirus-H long terminal repeat associating 2 (HHLA2) with unidentified function. Recently, B7-H7 has been identified as a specific ligand for human CD28H. The B7-H7-CD28H pathway strongly promoted CD4+ T-cell proliferation and cytokine production via an AKT-dependent signaling cascade in the presence of TCR signaling, suggesting B7-H7 comprises a new co-stimulatory pathway. The first IgV domain of B7-H7, which presumably binds to a putative receptor, shows the highest homology to other B7 family members.

Product Specifications

Background

Specifications

This protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™) . The protein has a calculated MW of 40.7 kDa. The protein migrates as 50-66 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

Accession Number

Q9UM44-1

Expression Region

Ile 23 - Asn 344

Host

HEK293

Target

B7-H7

Conjugation

Biotin-labeled

Tag

C-10xHis & C-Avi

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

95%

Bioactivity

Immobilized Biotinylated Human B7-H7, His,Avitag (Cat. No. B77-H82E3) at 1 μg/mL (100 μL/well) on streptavidin (Cat. No. STN-N5116) precoated (0.5 μg/well) plate can bind Human CD28H, Fc Tag (Cat. No. CDH-H5251) with a linear range of 0.1-3 ng/mL (QC tested).