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Your Position: Home > Immune Checkpoint Proteins > LILRB4 > Cynomolgus LILRB4 / CD85k / ILT3 Protein, His Tag

Cynomolgus LILRB4 / CD85k / ILT3 Protein, His Tag

INTRODUCTION

QC & Assay Protocol

Citation & Background

Synonym
LILRB4,ILT3,LIR5,CD85K,HM18
Source
Cynomolgus LILRB4, His Tag (CDK-C5227) is expressed from human 293 cells (HEK293). It contains AA Gln 22 - Glu 259 (Accession # XP_015297198.1).
Predicted N-terminus: Gln 22
Request for sequence
Molecular Characterization
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 28.0 kDa. The protein migrates as 38 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
Endotoxin
Less than 1.0 EU per μg by the LAL method.
Purity
>90% as determined by SDS-PAGE.

Formulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
Contact us for customized product form or formulation.
Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
No activity loss was observed after storage at:
1. 4-8^°C for 12 months in lyophilized state;
2. -70^°C for 3 months under sterile conditions after reconstitution.

SDS-PAGE

Cynomolgus LILRB4, 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%.

Background
Leukocyte immunoglobulin-like receptor subfamily B member 4 (LILRB4) is also known as CD85 antigen-like family member K (CD85K), Immunoglobulin-like transcript 3 (ILT-3), Leukocyte immunoglobulin-like receptor 5 (LIR-5), Monocyte inhibitory receptor HM18, which belongs to the leukocyte immunoglobulin-like receptor (LIR) family. LILRB4 / CD85K contains 2 Ig-like C2-type (immunoglobulin-like) domains. CD85K is detected in monocytes, macrophages, dendritic cells, lung, natural killer cells and B-cells. LILRB4 / CD85K is receptor for class I MHC antigens. CD85K recognizes a broad spectrum of HLA-A, HLA-B, HLA-C and HLA-G alleles, involved in the down-regulation of the immune response and the development of tolerance. LILRB4 interferes with TNFRSF5-signaling and NF-kappa-B up-regulation and inhibits receptor-mediated phosphorylation of cellular proteins and mobilization of intracellular calcium ions.
References
- (1) Cella M., et al., 1997, J. Exp. Med. 185:1743-1751.
- (2) Chang C.C., et al., 2002, Nat. Immunol. 3:237-243.
Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.