Human PEAR1 Antibody

Catalog # Availability Size / Price Qty
Detection of PEAR1 in Human Peripheral Blood Platelets by Flow Cytometry
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Human PEAR1 Antibody Summary

Species Reactivity
Detects human PEAR1 in direct ELISAs and Western blots. In Western blots, no cross-reactivity with recombinant human Tenascin R or recombinant mouse Tenascin C is observed.
Monoclonal Mouse IgG2A Clone # 492621
Protein A or G purified from hybridoma culture supernatant
Chinese hamster ovary cell line CHO-derived recombinant human PEAR1
Accession # Q5VY43
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
1 µg/mL
Recombinant Human PEAR1 (Catalog # 4527-PR)
Flow Cytometry
2.5 µg/106 cells
See below
Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

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.

Scientific Data

Flow Cytometry Detection of PEAR1 antibody in Human Peripheral Blood Platelets antibody by Flow Cytometry View Larger

Detection of PEAR1 in Human Peripheral Blood Platelets by Flow Cytometry Human peripheral blood platelets were stained with Mouse Anti-Human PEAR1 Monoclonal Antibody (Catalog # MAB4527) followed by Allophycocyanin-conjugated Anti-Mouse IgG F(ab')2Secondary Antibody (Catalog # F0101B) and Integrin a 2b/CD41 Fluorescein-conjugated Monoclonal Antibody. Quadrant markers were set based on isotype control antibody staining (Catalog # MAB002).

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Preparation and Storage

Reconstitute at 0.5 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
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: PEAR1

Platelet endothelial aggregation receptor 1 (PEAR1) is a 150 kDa type I transmembrane protein and member of the MEGF family of proteins (1). Human PEAR1 is synthesized as a 1037 amino acid (aa) precursor that contains a 20 aa signal sequence, a 735 aa extracellular domain (ECD), a 21 aa transmembrane region, and a 261 aa cytoplasmic region. The ECD consists of 15 EGF-like repeats that vary in length from 39 to 42 aa and contain a consensus sequence of CX1-2GX2GX2-4CX3CX1-3CX1-2GX1-2CX4GX1CX1CX2GX2GX2C (1). The consensus repeat contains six conserved glycine residues and eight conserved cysteine residues, suggesting four disulfide-bonded cysteine pairs in each EGF repeat (1). Within the ECD, there are also five potential sites for N-linked glycosylation. The cytoplasmic region contains five potential Src homology 3-binding, proline-rich domains (1). Mature human PEAR1 is 84% aa identical to mature mouse PEAR1. PEAR1 is most highly expressed in platelets and endothelial cells (1). Functionally, PEAR1 is a receptor for a yet undetermined ligand that signals upon the formation of platelet‑platelet contacts induced both by platelet aggregations and by platelet centrifugation (1). The signaling enhances and stabilizes platelet thrombi (2). Upon aggregation, the surface-expressed protein is tyrosine-phosphorylated (1). This phosphorylation event is inhibited by the alpha IIb beta 3 antagonist eptifibatide, thus demonstrating that PEAR1 tyrosine phosphorylation is dependent on surface contacts between activated platelets (1). PEAR1 can be phosphorylated in an alpha IIb beta 3 integrin-dependent manner on tyrosine (Tyr925) and serine residues (Ser593 and Ser1029) and, potentially, at Tyr804, Tyr943, and Tyr979 (1). Inherited PEAR1 variations that alter expression or function of the platelet signaling molecule could modify agonist-induced aggregation in native platelets (2). In addition, a genetic variant in PEAR1 could be an important determinant of residual platelet function during aspirin treatment, because the COX1/thromboxane A2 pathway will be strongly inhibited by aspirin, and maximal aggregation will then be dependent on other secondary signaling pathways (2).

  1. Nanda, N. et al. (2005) J. Biol. Chem. 280:24680.
  2. Herrera-Galeano, J.E. et al. (2008) Arterioscler. Thromb. Vasc. Biol. 28:1484.
Long Name
Platelet endothelial aggregation receptor 1
Entrez Gene IDs
375033 (Human); 73182 (Mouse)
Alternate Names
Jedi; PEAR1; platelet endothelial aggregation receptor 1

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Isotype Controls

Mouse IgG2A Isotype Control

Reconstitution Buffers

Secondary Antibodies

Reviews for Human PEAR1 Antibody

Average Rating: 3.7 (Based on 3 Reviews)

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Human PEAR1 Antibody
By Anonymous on 01/14/2021
Application: Microarrays Sample Tested: EDTA Plasma Species: Human

Human PEAR1 Antibody
By Anonymous on 11/14/2018
Application: Microarrays Sample Tested: EDTA Plasma Species: Human

Human PEAR1 Antibody
By Anonymous on 11/09/2018
Application: MiAr Sample Tested: EDTA Plasma Species: Human