Name : Human LILRB2/CD85d/ILT4 Protein

Product Source :
Recombinant Human LILRB2/CD85d/ILT4 Protein is expressed from HEK293 with hFc tag at the C-Terminus. It contains Gln22-His458.[Accession | Q8N423-1]

Molecular Weight :
The protein has a predicted MW of 74.1 kDa. Due to glycosylation, the protein migrates to 80-110 kDa based on Tris-Bis PAGE result.

Endotoxin Level :
Less than 1EU per μg by the LAL method.

Purity :
> 95% as determined by Tris-Bis PAGE> 95% as determined by SEC-HPLC

Formulation :
Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.

Reconstitution :
Centrifuge the tube before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.

Storage and Stability :
-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.

Product Concentration :
Tris-Bis PAGE Human LILRB2 on Tris-Bis PAGE under reduced condition. The purity is greater than 95%. SEC-HPLC The purity of Human LILRB2 is greater than 95% as determined by SEC-HPLC. ELISA Data Immobilized Human LILRB2, hFc Tag at 1μg/ml (100μl/well) on the plate. Dose response curve for Biotinylated Anti-LILRB2 Antibody, hFc Tag with the EC50 of 14.6ng/ml determined by ELISA (QC Test). SPR Data Human LILRB2, hFc tag captured on Protein A Chip can bind Human HLA-G Tetramer, His Tag with an affinity constant of 9.20nM as determined in SPR assay (Biacore T200). SPR Data Human LILRB2, hFc Tag captured on Protein A chip, can bind Human ANGPTL2, His Tag with an affinity constant of 0.14μM as determined in a SPR assay (Biacore T200).

Background :
The immunoglobulin-like transcript (ILT) comprise a family of activating and inhibitory type immunoreceptors whose genes are located in the same locus that encodes killer cell Ig-like receptors (KIR). ILT4, also known as LIR-2 and LILRB2, is a type I transmembrane protein expressed primarily on monocytes and dendritic cells (DC). LILRB2 is a receptor for class I MHC antigens. Recognizes a broad spectrum of HLA-A, HLA-B, HLA-C, HLA-G and HLA-F alleles.

Synonyms :
CD85d; ILT4; ILT-4; ILT4CD85d; LILRB2; LIR2; MIR10

References & Citations :
(1)Blocking immunoinhibitory receptor LILRB2 reprograms tumor-associated myeloid cells and promotes antitumor immunity.J Clin Invest. 2018;128(12):5647-5662.

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