Mouse PILR-beta Antibody

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Mouse PILR-beta Antibody Summary

Species Reactivity
Detects mouse PILR-beta in direct ELISAs and Western blots. In direct ELISAs and Western blots, approximately 20% cross-reactivity with recombinant mouse PILR-alpha is observed.
Polyclonal Goat IgG
Antigen Affinity-purified
Mouse myeloma cell line NS0-derived recombinant mouse PILR-beta
Accession # Q2YFS2
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.


Recommended Concentration
Western Blot
0.1 µg/mL
Recombinant Mouse PILR-beta (Catalog # 3525-PR)

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

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Preparation and Storage

Reconstitute at 0.2 mg/mL in sterile PBS.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
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.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: PILR-beta

PILR-beta (paired immunoglobulin-like type 2 receptor-beta) is one of two members of a small family of immunoregulatory Ig-superfamily receptors (1, 2). It is a counterpart to PILR-alpha and it likely arose through PILR-alpha gene duplication and rearrangement (1). The PILRs represent one of many pairs of Ig-like domain-containing receptors that participate in immune regulation. PILR-beta and -alpha should not be confused with the similarly named PIRs (also paired immunoglobulin-like receptors), or the functionally-related SIRP and ILT/LILR/CD85/LIR family of receptors (2). While PIRs, ILTs and SIRPs contain three to six Ig-like domains in their extracellular region, PILR-beta and -alpha show only one Ig-like region in their extracellular domain (ECD) (1, 2). Mouse PILR-beta is a 196 amino acid (aa) type I transmembrane (TM) protein (3). It contains a 167 aa ECD, a 21 aa TM segment, and a short 8 aa cytoplasmic region. The ECD shows a V-type Ig-like domain (aa 39‑135), while the TM segment contains a positively-charged Lys at position # 202. This Lys is known to interact with the transmembrane signaling adaptor protein DAP12, making PILR-beta an activating receptor. Activation of PILR-beta through CD99 ligation induces NK cell cytotoxicity and dendritic cell secretion of NO and TNF-alpha (3). Mouse PILR-beta is found on NK cells, neutrophils, macrophages, and monocyte-derived dendritic cells (3). Mouse PILR-beta ECD is 44% and 75% aa identical to human and rat PILR-beta ECD, respectively; it is 75% aa identical to the ECD of mouse PILR-alpha (3). Evidence suggests that mouse PILR-beta will not be active in a human system (3). Potential isoforms of PILR-beta have been reported. One shows an alternate start site at Met14, a second shows a 21 aa substitution for the C-terminal 67 aa, and a third exhibits multiple polymorphisms for an overall aa identity of 86% (4, 5, 6).

  1. Wilson, M.D. et al. (2006) Physiol. Genomics 27:201.
  2. Lanier, L.L. (2001) Curr. Opin. Immunol. 13:326.
  3. Shiratori, I. et al. (2004) J. Exp. Med. 199:525.
  4. Genbank Accession # NP_573472.
  5. Genbank Accession # BAC29442.
  6. Genbank Accession # XP_001480583.
Long Name
Paired-Ig-likeType 2 Receptor beta
Entrez Gene IDs
29990 (Human); 170741 (Mouse)
Alternate Names
activating receptor PILRbeta; Activating receptor PILR-beta; Cell surface receptor FDFACT; cell surface receptor FDFACT1; cell surface receptor FDFACT2; FDFACT; FDFACT1; FDFACT2; paired immunoglobin-like receptor beta; paired immunoglobin-like type 2 receptor beta; paired immunoglobulin-like receptor beta; paired immunoglobulin-like type 2 receptor beta; PILRB; PILRbeta; PILR-beta

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