Recombinant Human LILRB1/CD85j/ILT2 Fc Chimera Protein, CF

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Recombinant Human LILRB1/CD85j/ILT2 Fc Chimera Protein, CF Binding Activity
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Product Details
Citations (4)
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Recombinant Human LILRB1/CD85j/ILT2 Fc Chimera Protein, CF Summary

>90%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured by its ability to support the adhesion of HSB2 human peripheral blood acute lymphoblastic leukemia cells. Immobilized Recombinant Human LILRB1/CD85j/ILT2 Fc Chimera at 5 µg/mL, 100 µL/well can support 60-80% HSB2 cell adhesion, when 1 x 105 cells were added in each well of a 96-well plate.
Mouse myeloma cell line, NS0-derived human LILRB1/CD85j/ILT2 protein
Human LILRB1/CD85j/ILT2
Accession # Q8NHL6
N-terminus C-terminus
Accession #
N-terminal Sequence
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
73.8 kDa (monomer)
106 kDa, reducing conditions

Product Datasheets

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Data Image

Binding Activity Binding Activity View Larger

Recombinant Human LILRB1/CD85j/ILT2 Fc Chimera (Catalog #2017-T2) supports the adhesion of HSB2 humanperipheral blood acute lymphoblastic leukemia cells. Immobilized RecombinantHuman LILRB1/CD85j/ILT2 Fc Chimera at 5 µg/mL, 100 µL/well can support 60-80% HSB2cell adhesion, when 1 x 105 cells were added in each well of a 96-well plate.

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Background: LILRB1/CD85j/ILT2

LILRB1, also known as CD85j and ILT2, is a 110 kDa transmembrane glycoprotein in the LILR immunoregulatory protein family (1). 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 (2). Alternative splicing generates an additional isoform that lacks the transmembrane and cytoplasmic regions (3). LILRB1 is expressed on the surface of B cells and monocytes, as well as subsets of NK cells, memory/effector CD8+ T cells, gamma δ T cells, and monocyte-derived dendritic cells (3-7). LILRB1 binds to MHC-I as well as non-classical MHC-I molecules (e.g. HLA-F, HLA-G, and HC-B27) and the MHC-I mimetic UL18 encoded by cytomegalovirus (3, 5, 8-10). R&D Systems
in-house testing indicates that LILRB1 also binds to Angiopoietin-like 7. Ligation of LILRB1 inhibits the antigen induced proliferation and activation of CD8+ T cells, CD4+ T cells, NK cells, and gamma δ T cells (3, 4, 11-13). On dendritic cells, ligation inhibits the production of IL-10, IL-12p70, and TGF-beta and protects from Fas-mediated apoptosis (7).

  1. Thomas, R. et al. (2010) Clin. Rev. Allergy Immunol. 38:159.
  2. Samaridis, J. and M. Colonna (1997) Eur. J. Immunol. 27:660.
  3. Colonna, M. et al. (1997) J. Exp. Med. 186:1809.
  4. Harly, C. et al. (2011) Blood 117:2864.
  5. Cosman, D. et al. (1997) Immunity 7:273.
  6. Young, N.T. et al. (2001) J. Immunol. 166:3933.
  7. Young, N.T. et al. (2008) Blood 111:3090.
  8. Lepin, E.J.M. et al. (2000) Eur. J. Immunol. 30:3552.
  9. Shiroishi, M. et al. (2003) Proc. Natl. Acad. Sci. USA 100:8856.
  10. Allen, R.L. et al. (2001) J. Immunol. 167:5543.
  11. Ince, M.N. et al. (2004) Immunology 112:531.
  12. Saverino, D. et al. (2000) J. Immunol. 165:3742.
  13. Saverino, D. et al. (2002) J. Immunol. 168:207.
Long Name
Leukocyte Immunoglobulin-like Receptor, Subfamily A (with TM domain), Member 1
Entrez Gene IDs
10859 (Human)
Alternate Names
CD85 antigen-like family member J; CD85j antigen; CD85j; Ig-like transcript 2; ILT2; ILT-2; ILT2FLJ37515; Immunoglobulin-like transcript 2; leukocyte Ig-like receptor-1; Leukocyte immunoglobulin-like receptor 1; leukocyte immunoglobulin-like receptor subfamily B member 1 soluble isoform; leukocyte immunoglobulin-like receptor subfamily B member 1; leukocyte immunoglobulin-like receptor, subfamily B (with TM and ITIM domains); LILRB1; LIR1; LIR1LIR-1MIR-7CD85MIR7CD85 antigen; member 1; MIR7; Monocyte/macrophage immunoglobulin-like receptor 7

Citations for Recombinant Human LILRB1/CD85j/ILT2 Fc Chimera Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

4 Citations: Showing 1 - 4
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  1. The extracellular interactome of the human adenovirus family reveals diverse strategies for immunomodulation
    Nat Commun, 2016;7(0):11473.
    Species: Human
    Sample Types: Recombinant Protein
  2. Cis association of leukocyte Ig-like receptor 1 with MHC class I modulates accessibility to antibodies and HCMV UL18.
    Authors: Li N, Fu L, Uchtenhagen H, Achour A, Burshtyn D
    Eur J Immunol, 2013;43(4):1042-52.
    Species: N/A
    Sample Types: Protein
    Applications: Bioassay
  3. HLA-G inhibition of NK-cell cytolytic function is uncoupled from tumor cell lipid raft reorganization.
    Authors: Baudhuin J, Lesport E, Sousa S, Migraine J, Vigneron J, LeMaoult J, Carosella ED, Mooney N, Favier B
    Eur. J. Immunol., 2012;42(3):700-9.
    Species: Human
    Sample Types: Whole Cells
    Applications: Flow Cytometry
  4. HLA-G expression in human embryonic stem cells and preimplantation embryos.
    Authors: Verloes A, Van de Velde H, LeMaoult J
    J. Immunol., 2011;186(4):2663-71.
    Species: Human
    Sample Types: Protein
    Applications: Luminex Detection


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