Pentraxin 2/SAP Antibody [Unconjugated]


Western blot shows lysates of mouse kidney tissue, mouse liver tissue, and human kidney tissue. PVDF membrane was probed with 0.2 µg/mL of Sheep Anti-Human/Mouse Pentraxin 2/SAP Antigen Affinity-purified Polyclonal more
Simple Western lane view shows lysates of mouse kidney tissue, loaded at 0.2 mg/mL. A specific band was detected for Pentraxin 2/SAP at approximately 36 kDa (as indicated) using 2 µg/mL of Sheep Anti-Human/Mouse more

Product Details

Reactivity Hu, MuSpecies Glossary
Applications WB, Simple Western

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Pentraxin 2/SAP Antibody [Unconjugated] Summary

Mouse myeloma cell line NS0-derived recombinant mouse Pentraxin 2/SAP
Accession # P12246
Detects human and mouse Pentraxin 2/SAP in direct ELISAs and Western blots. In direct ELISA, less 75% cross-reactivity with recombinant rat Pentraxin 2/SAP is observed, and approximately 25% cross-reactivity with recombinant human CRP is observed.
Immunogen affinity purified
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  • Western Blot 0.2 ug/mL
  • Simple Western 2 ug/mL
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AF2558 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.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
No Preservative
Immunogen affinity purified
Reconstitution Instructions
Reconstitute at 0.2 mg/mL in sterile PBS.


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

Alternate Names for Pentraxin 2/SAP Antibody [Unconjugated]

  • 9.5S alpha-1-glycoprotein
  • amyloid P component, serum
  • APCS
  • MGC88159
  • Pentraxin 2
  • PTX2
  • PTX2serum amyloid P-component
  • SAP
  • SAPpentaxin-related
  • Serum Amyloid P component


Pentraxin 2 (also known as Serum Amyoid P Component or SAP) is a secreted glycoprotein that is a universal non-fibrillar component of amyloid deposits. Amyloid is an abnormal extracellular deposit of insoluble protein fibrils that can lead to tissue damage and disease (1‑3). Pentraxin 2 belongs to the pentraxin (pentaxin) family, whose members have a characteristic pentagonal discoid arrangement of five non-covalently bound subunits (4). Pentraxin domains contain the consensus sequence, HxCx(S/T)WxS (x = any amino acid), a lectin fold, and two calcium-binding sites (1). They bind to a variety of unrelated molecules in a calcium-dependent lectin-like manner (1, 4, 5). Pentraxin 2 and C-reactive protein (CRP) are members of the classical or short pentraxin subfamily and share 46% amino acid (aa) identity (1). Mouse Pentraxin 2 is the major acute-phase protein whose expression is dependent on complement activation, IL-6 and/or IL-1 beta, while in humans, CRP is the major acute-phase protein (2, 5, 9). Both are produced and secreted by liver hepatocytes and circulate in plasma. The 204 aa mature mouse Pentraxin 2 shares 79% aa identity with rat Pentraxin 2 and 63‑70% aa identity with human, guinea pig, golden hamster, porcine, and bovine Pentraxin 2 (2, 5). Amyloid deposits containing Pentraxin 2 are implicated in a diverse range of diseases including Alzheimer’s, prion diseases, type 2 diabetes and various systemic amyloidoses (3, 6, 7). Pentraxin 2 regulates the solubility of amyloid fibrils and protects them from degradation. In addition to its pathogenic role, Pentraxin 2 also has an important physiological function in innate immunity (8). It is an opsonin that interacts with all three types of human Fc gamma receptors that mediate neutrophil phagocytosis (8). Pentraxin 2 has been proposed to bind and sequester a variety of ligands including auto-antigens, apoptotic cells, chromatin, DNA, and micro-organisms (1‑3). Pentraxin 2 is also a normal component of basement membranes (1).

  1. Garlanda, C. et al. (2005) Annu. Rev. Immunol. 23:337.
  2. Steel, D. and A. Whitehead (1994) Immunol. Today 15:81.
  3. Alexandrescu, A.T. (2005) Protein Sci. 14:1.
  4. Emsley, J. et al. (1994) Nature 367:338.
  5. Mole, J.E. et al. (1988) J. Immunol. 141:3642.
  6. Gillmore, J.D. et al. (2004) Immunology 112:255.
  7. Pepys, M. et al. (2002) Nature 417:254.
  8. Bharadwaj, D. et al. (2001) J. Immunol. 166:6735.
  9. Szalai, A.J. et al. (2000) J. Immunol. 165:1030.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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