• Species Reactivity

  Human

• Specificity

  Detects human Fibroblast Activation Protein alpha /FAP in direct ELISAs. In direct ELISAs, no cross-reactivity with recombinant human DPP6 is observed.

• Source

  Monoclonal Mouse IgG1 Clone # 427819

• Immunogen

  S. frugiperda insect ovarian cell line     Sf 21-derived recombinant human Fibroblast Activation Protein alpha /FAP    
  Leu26-Asp760    
  Accession # Q12884

• Formulation

  Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.

• Label

  Alexa Fluor 405

Applications

• Recommended    
  Concentration

  Sample

• Flow Cytometry

  0.25-1 μg/10    ⁶ cells

  WI-38 human lung fibroblast cell line

• 
  

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

Preparation and Storage

• Shipping

  The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

• Stability & Storage

  Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: Fibroblast Activation Protein alpha/FAP

FAP (also known as Seprase) is a 97 kDa Type II transmembrane serine protease that is structurally related to Dipeptidyl Peptidase IV (DPPIV) (1). FAP has substrate specificity similar to DPPIV, which is specific for N-terminal Xaa-Pro sequences, but FAP is also an endopeptidase able to degrade gelatin and Type I Collagen (2). The enzymatically active form of FAP is a dimer that migrates at ~170 kDa. It is associated with multiple integral membrane proteins such as Integrin  alpha ₃ beta ₁, UPA and DPPIV (3,4). FAP has a restricted tissue distribution. It is occasionally detected in fibroblasts and pancreatic islet cells, but is highly expressed on reactive stromal fibroblasts in epithelial cancers, in granulation tissue during wound healing, and in bone and soft tissue sarcomas (4-6). Because of its expression patterns and enzymatic activities, FAP is believed to play roles in tumor invasion, tissue remodeling, and wound repair. The 760 amino acid (aa) human FAP contains a 735 aa extracellular domain that is glycosylated and necessary for activity (4). It shares 90% aa identity with mouse and rat FAP. A reported 672 aa splicing variant diverges prior to the active site charge relay residues at the C-terminus.

• References:

1. Scanlan, M.J. et al. (1994) Proc. Natl. Acad. Sci. USA 91:5657.

2. Park, J.E. et al. (1999) J. Biol. Chem. 274:36505.

3. Pineiro-Sanchez, M.L. et al. (1997) J. Biol. Chem. 272:7595.

4. O'Brien, P. and B.F. O'Connor (2008) Biochim. Biophys. Acta 1784:1130.

5. Garin-Chesa, P. et al. (1990) Proc. Natl. Acad. Sci. USA 87:7235.

6. Rettig, W.J. et al. (1988) Proc. Natl. Acad. Sci. USA 85:3110.

• Entrez Gene IDs:

  2191 (Human); 14089 (Mouse)

• Alternate Names:

  170 kDa melanoma membrane-bound gelatinase; DKFZp686G13158; DPPIV; EC 3.4.21.-; FAP; FAPA; Fibroblast Activation Protein alpha; fibroblast activation protein, alpha; Integral membrane serine protease; Seprase; vibronectin