Recombinant Human KIR2DL2/CD158b1 Fc Chimera Protein, CF


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Reactivity HuSpecies Glossary
Applications Bioactivity

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Recombinant Human KIR2DL2/CD158b1 Fc Chimera Protein, CF Summary

Details of Functionality
Measured by its ability to bind HEK293T human embryonic kidney cells in a flow cytometry assay. When 1 μg of Recombinant Human KIR2DL2/CD158b1 Fc Chimera is added to 5 x 105 HEK293T cells, >20% of the cells will bind to the protein.
Mouse myeloma cell line, NS0-derived human KIR2DL2/CD158b1 protein
Human KIR2DL2
(His22 - His245)
Accession # P43627
(Pro100 - Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Structure / Form
Disulfide-linked homodimer
Protein/Peptide Type
Recombinant Proteins
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Note
<1.0 EU per 1 μg of the protein by the LAL method.


  • Bioactivity
Theoretical MW
51.2 kDa (monomer).
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
65-75 kDa, reducing conditions
Read Publications using
3015-KR in the following applications:

Packaging, Storage & Formulations

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.
Lyophilized from a 0.2 μm filtered solution in PBS.
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
Reconstitution Instructions
Reconstitute at 100 μg/mL in PBS.


This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human KIR2DL2/CD158b1 Fc Chimera Protein, CF

  • CD158b1
  • CL-43
  • KIR2DL2
  • NKAT6


KIR2DL2 (2DL2, formerly NKAT6, designated CD158b) is a 348 amino acid (aa) type I transmembrane glycoprotein that belongs to the human killer cell Ig‑like receptor (KIR) family (1, 2). KIRs are expressed on human CD56dim NK cells and T cell subsets, and regulate effector functions in the innate immune system (1 ‑ 3). KIRs are named for the number of Ig‑like domains (2D or 3D) in the extracellular domain (ECD), and whether they have long or short (L, S) cytoplasmic tails (1 ‑ 3). Individuals will express varying subsets of inhibiting and activating KIRs with varying polymorphisms (1, 4). Like other inhibiting KIRs, KIR2DL2 has two ITIM domains within its long tail that block activating receptor clustering (2, 5). Within the ECD, KIR2DL2 shares very high aa sequence identity (98%) with KIR2DL3. The two segregate as alleles of the same gene, although KIR2DL2 shows higher avidity for HLA‑C1 ligands (1, 6). Extracellular aa identity is also high for KIR2DL1 (92%). The three together recognize and inhibit NK cytotoxicity against cells expressing any HLA‑C allotype, allowing self‑recognition, but also conferring susceptibility to leukemia (1 ‑ 3). KIR2DL2 recognizes Asn80‑containing HLA‑C1 and, more weakly, Lys80‑containing C2 allotypes (1, 6 ‑ 8). KIR2DL2 can impact both innate and adaptive immunity, contributing to either viral persistence or antiviral immunity, depending on the HLA class I molecules expressed by the individual (9).

  1. Purdy, A.K. and Campbell, K.S. (2009) Cancer Biol. Ther. 8:13.
  2. Lanier, L. L. (2005) Annu. Rev. Immunol. 23:225.
  3. Kulkarni, S. et al. (2008) Sem. Immunol. 20:343.
  4. Middleton, D. and F. Gonzelez (2009) Immunology 129:8.
  5. Abeyweera, T.P. et al. (2011) J. Cell Biol. 192:675.
  6. Moesta, A.K. et al. (2008) J. Immunol. 180:3969.
  7. Boyington, J.C. et al. (2000) Nature 405:537.
  8. Snyder, G.A. et al. (1999) Proc. Natl. Acad. Sci. USA 96:3864.
  9. Seich al Basatena, N-K. et al. (2011) PLoS Pathog. 7:e1002270.

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Gene Symbol KIR2DL2