• Species Reactivity

  Human

• Specificity

  Detects human Serpin B8/Proteinase Inhibitor 8 in direct ELISAs and Western blots. In direct ELISAs, approximately 10% cross-reactivity with recombinant mouse Serpin B8 is observed and less than 2% cross-reactivity with recombinant human (rh) Serpin B6, rhSerpin B9, and rhSerpin A5 is observed.

• Source

  Polyclonal Goat IgG

• Purification

  Antigen Affinity-purified

• Immunogen

  S. frugiperda insect ovarian cell line     Sf 21-derived recombinant human Serpin B8/Proteinase Inhibitor 8    
  Asp2-Pro374    
  Accession # P50452

• 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

  0.1 µg/mL

  Recombinant Human Serpin B8/Proteinase Inhibitor 8

• 
  

• Immunoprecipitation

  25 µg/mL

  Conditioned cell culture medium spiked with Recombinant Human Serpin B8/Proteinase Inhibitor 8,

• 
  

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

• Reconstitution

  Reconstitute at 0.2 mg/mL in sterile PBS.

• 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: Serpin B8/Proteinase Inhibitor 8

Serpin B8 (serine proteinase inhibitor‑clade B #8; also PI8) is a 42‑45 kDa, cytoplasmic and secreted member of the ovalbumin (clade B)‑subfamily, Serpin superfamily of protease inhibitors. It is produced by multiple cell types and shows inhibitory activity towards furin and other proteinases such as chymotrypsin. Human Serpin B8 is 374 amino acids (aa) in length. Although it has no signal sequence, it is released by platelets. The active inhibitor site lies between Arg336 and Arg342. One potential isoform shows a 2 aa substitution for the C‑terminal 134 amino acids. Full length human Serpin B8 shares 78% and 83% aa identity with mouse and canine Serpin B8, respectively.

• Entrez Gene IDs:

  5271 (Human); 20725 (Mouse); 288937 (Rat)

• Alternate Names:

  CAP2; CAP-2; CAP2clade B (ovalbumin), member 8; Cytoplasmic antiproteinase 2; NK10; Peptidase inhibitor 8; PI8; PI-8; protease inhibitor 8 (ovalbumin type); Serpin B8; serpin peptidase inhibitor, clade B (ovalbumin), member 8