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Mouse Monoclonal to CD158agh

HP-MA4 (IgG2b)

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Killer cell immunoglobulin-like receptors (KIRs) are polymorphic transmembrane glycoproteins expressed by natural killer cells and subsets of T cells. They are classified by the number of extracellular immunoglobulin domains (2D or 3D) and by whether they have a long (L) or short (S) cytoplasmic domain. KIR proteins with the long cytoplasmic domain (such as CD158a / KIR2DL1) transduce inhibitory signals upon ligand binding via an immune tyrosine-based inhibitory motif (ITIM), while KIR proteins with the short cytoplasmic domain (such as CD158g / KIR2DS5, CD158h / KIR2DS1, or KIR2DS3) lack the ITIM motif and instead associate with the TYRO protein tyrosine kinase binding protein to transduce activating signals. The ligands for CD158 isoforms are subsets of MHC class I molecules.


The mouse monoclonal antibody HP-MA4 recognizes CD158 isoforms KIR2DL1 (CD158a), KIR2DS5 (CD158g), KIR2DS1 (CD158h), and KIRDS3. It does not recognize the isoforms CD158b1,d,f,i,j.

Regulatory Status


Human NK cell line LB2

Species Reactivity:

  • Human

Negative Species:


  • Flow Cytometry
  • Immunoprecipitation
Usage note:
Indicated dilutions are recommended starting points for use of this product. Working concentrations should be determined by the investigator.

Product Specific References

  • *Wiernik A, Foley B, Zhang B, Verneris MR, Warlick E, Gleason MK, Ross JA, Luo X, Weisdorf DJ, Walcheck B, Vallera DA, Miller JS: Targeting natural killer cells to acute myeloid leukemia in vitro with a CD16 x 33 bispecific killer cell engager and ADAM17 inhibition. Clin Cancer Res. 2013 Jul 15;19(14):3844-55 [Abstract] [Full Text]
  • For research use only. Not for drug, diagnostic or other use.

    Example Data

    HP-MA4 pur

    Fig. 1. Surface staining of human peripheral blood with anti-CD158a/g/h (HP-MA4) purified / GAM-APC.

    HP-MA4 PE

    Fig. 2. Surface staining of human peripheral blood with anti-CD158a/g/h (HP-MA4) PE.

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