Human CD42b/GPIb  alpha Antibody

Catalog # Availability Size / Price Qty
AF4067
AF4067-SP
Detection  of Human CD42b/GPIb  alpha  by Western Blot.
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Citations (1)
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Human CD42b/GPIb  alpha Antibody Summary

Species Reactivity
Human
Specificity
Detects human CD42b/GPIb  alpha in direct ELISAs and Western blots.
Source
Polyclonal Sheep IgG
Purification
Antigen Affinity-purified
Immunogen
Mouse myeloma cell line NS0-derived recombinant human CD42b/GPIb  alpha
His17-Leu505
Accession # P07359
Formulation
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.
Label
Unconjugated

Applications

Recommended Concentration
Sample
Western Blot
1 µg/mL
See below
Flow Cytometry
2.5 µg/106 cells
See below
CyTOF-ready
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.

Data Examples

Western Blot Detection  of Human CD42b/GPIb  alpha  by Western Blot. View Larger

Detection of Human CD42b/GPIb  alpha by Western Blot. Western blot shows lysates of human platelets. PVDF membrane was probed with 1 µg/mL of Sheep Anti-Human CD42b/GPIb  alpha Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4067) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for CD42b/GPIb  alpha at approximately 135 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Flow Cytometry Detection of Human CD42b/GPIb  alpha  in Human Whole Blood CD41+ Platelets by Flow Cytometry. View Larger

Detection of Human CD42b/GPIb alpha  in Human Whole Blood CD41+ Platelets by Flow Cytometry.

Human whole blood CD41+ platelets were stained with Sheep Anti-Human CD42b/GPIb  alpha Polyclonal Antibody (Catalog # AF4067) followed by NL637-conjugated anti sheep antibody (Catalog # NL011) and Human CD41 FITC-conjugated Monoclonal Antibody. Quadrant markers were set based on control antibody staining (Catalog # 5‑001‑A).

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.

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Preparation and Storage

Reconstitution
Reconstitute at 0.2 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Availability
Size / Price
Qty
RB01
Shipping
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: CD42b/GPIb alpha

Platelet glycoprotein Ib alpha chain (GPIb  alpha ), also known as CD42b alpha, is a 145 kDa type I transmembrane protein that is a member of the leucine-rich repeat (LRR) family of ligand binding proteins (1‑3). It is expressed by platelets as the ligand-binding subunit of the platelet GPIb-IX-V complex (4). Human GPIb  alpha contains a 16 amino acid (aa) signal sequence, a 489 aa extracellular domain (ECD), a 21-aa transmembrane domain, and a 100 aa cytoplasmic region. The ECD contains 8 LRRs, with # 2, 3, and 4 having been demonstrated to regulate shear-dependent adhesion to von Willebrand factor (vWF) (5, 6). The LRRs are followed by a thrombin-binding anionic region that includes three sulfated tyrosines, a sialomucin domain with N- and O-linked carbohydrates, and two cysteines near the membrane that allow dimerization with GP1b  alpha beta (1‑6). Four human isoforms with 1 to 4 repeats of aa 398‑411 within the sialomucin domain of mature GPIb  alpha are known to exist but have unknown significance (7). The ECD of human GPIb  alpha shares 48‑51% aa identity with mouse, rat, bovine, and canine GPIb  alpha. The metalloproteinase TACE/ADAM17 constitutively and inducibly cleaves GPIb  alpha, between Gly480 and Val481. This releases a soluble form called glycocalicin that circulates at ~2 μg/mL (8, 9). GPIb  alpha binding to ligands such as thrombin, kininogen, and coagulation factors XI and XII helps to initiate platelet activation and coordinate the coagulation cascade (1, 10‑12). Binding of GPIb  alpha to vWF or thrombospondin in the plasma or matrix, vWF or P-selectin on endothelial cells, or the integrin  alpha M beta 2 (MAC-1) on myeloid cells, controls response to vascular injury (1, 13). Bernard-Soulier syndrome and platelet-type von Willebrand disease are platelet function disorders that can be caused by mutations in GPIb  alpha (1, 14).

References
  1. Andrews, R.K. et al. (2007) Arterioscler. Thromb. Vasc. Biol. 27:1511. 
  2. Lopez, J.A. et al. (1987) Proc. Natl. Acad. Sci. USA 84:5615.
  3. Wenger, R.H. et al. (1988) Biochem. Biophys. Res. Commun. 156:389. 
  4. Luo, S-Z. et al. (2007) Blood 109:603. 
  5. Uff, S. et al. (2002) J. Biol. Chem. 277:35657.
  6. Shen, Y. et al. (2006) J. Biol. Chem. 281:26419.
  7. Ishida, F. et al. (1995) Blood 86:1356.
  8. Gardiner, E.E. et al. (2007) J. Thromb. Haemost. 5:1530.
  9. Beer, J.H. et al. (1994) Blood 83:691.
  10. Adam, F. et al. (2003) Eur. J. Biochem. 270:2959.
  11. Baglia, F.A. et al. (2004) J. Biol. Chem. 279:49323.
  12. Bradford, H.N. et al. (2000) J. Biol. Chem. 275:22756.
  13. Wang, Y. et al. (2005) Circulation 112:2993.
  14. Othman, M. et al. (2005) Blood 105:4330.
Long Name
Glycoprotein lb [Platelet] alpha
Entrez Gene IDs
2811 (Human); 14723 (Mouse)
Alternate Names
Antigen CD42b-alpha; BP1BA; BSS; CD42b antigen; CD42b; CD42b-alpha; glycoprotein Ib (platelet), alpha polypeptide; Glycoprotein Ibalpha; GP1B; GP1BA; GPIb alpha; GP-Ib alpha; GPIbA; GPIb-alpha; MGC34595; platelet glycoprotein Ib alpha chain; platelet membrane glycoprotein 1b-alpha subunit

Product Datasheets

Citation for Human CD42b/GPIb  alpha Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. The collagen-binding integrin alpha2beta1 is a novel interaction partner of the Trimeresurus flavoviridis venom protein flavocetin-A.
    Authors: Arlinghaus F, Eble J
    J Biol Chem, 2013;288(2):947-55.
    Species: Human
    Sample Types: Cell Lysates
    Applications: WB

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