Name : Human LILRB1/CD85j/ILT2 Protein

Product Source :
Recombinant Human LILRB1/CD85j/ILT2 Protein is expressed from HEK293 with His tag and Avi tag at the C-Terminus. It contains Gly24-His458.[Accession | Q8NHL6-1]

Molecular Weight :
The protein has a predicted MW of 50 kDa. Due to glycosylation, the protein migrates to 72-78 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 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 LILRB1 on Tris-Bis PAGE under reduced conditions. The purity is greater than 95%. SEC-HPLC The purity of Human LILRB1 is greater than 95% as determined by SEC-HPLC. ELISA Data Immobilized Human LILRB1, His Tag at 1μg/ml (100μl/well) on the plate. Dose response curve for Anti-LILRB1 Antibody, hFc Tag with the EC50 of 5.4ng/ml determined by ELISA (QC Test). Blocking Data Serial dilutions of Anti-LILRB1 Antibody were added into Biotinylated Human HLA-G Complex Tetramer, His Tag : Human LILRB1, His Tag binding reactioins. The half maximal inhibitiory concentration (IC50) is 23ng/ml.

Background :
LILRB1, also known as CD85j and ILT2, is a 110 kDa transmembrane glycoprotein in the LILR immunoregulatory protein family. Mature human LILRB1 consists of a 438 amino acid (aa) extracellular domain (ECD) with 4 tandem Ig-like domains, a 21 aa transmembrane segment, and a 168 aa cytoplasmic domain with 4 inhibitory ITIM motifs.LILRB1 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. Receptor for H301/UL18, a human cytomegalovirus class I MHC homolog. Ligand binding results in inhibitory signals and down-regulation of the immune response.

Synonyms :
ILT2; ILT-2; ILT2FLJ37515; LILRB1; LIR1; MIR7; CD85J; XXbac-BCX85G21.4

References & Citations :
(1)Anderson K J , Allen R L. Regulation of T‐cell immunity by leucocyte immunoglobulin‐like receptors: innate immune receptors for self on antigen‐presenting cells[J]. Immunology, 2009, 127.

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