• Product name
  • Description
    Rabbit polyclonal to MASPIN
  • Tested applications
    Suitable for: IHC-P, WBmore details
  • Species reactivity
    Reacts with: Human
    Predicted to work with: Mouse, Rat
  • Immunogen

    Synthetic peptide conjugated to KLH derived from within residues 100 - 200 of Human MASPIN.

    (Peptide available as ab24350.)

  • Positive control
    • This antibody gave a positive signal in the following whole cell lysates: Human Prostate Tumor.



Our Abpromise guarantee covers the use of ab22354 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
IHC-P Use at an assay dependent concentration.
WB Use a concentration of 1 µg/ml. Detects a band of approximately 40 kDa (predicted molecular weight: 42 kDa).


  • Function
    Tumor suppressor. It blocks the growth, invasion, and metastatic properties of mammary tumors. As it does not undergo the S (stressed) to R (relaxed) conformational transition characteristic of active serpins, it exhibits no serine protease inhibitory activity.
  • Tissue specificity
    Normal mammary epithelial cells.
  • Sequence similarities
    Belongs to the serpin family. Ov-serpin subfamily.
  • Cellular localization
    Secreted > extracellular space.
  • Information by UniProt
  • Database links
  • Alternative names
    • Maspin antibody
    • Ovalbumin antibody
    • Peptidase inhibitor 5 antibody
    • PI-5 antibody
    • PI5 antibody
    • protease inhibitor 5 (maspin) antibody
    • Protease inhibitor 5 antibody
    • Serine (or cysteine) peptidase inhibitor, clade B, member 5 antibody
    • serine (or cysteine) proteinase inhibitor, clade B (ovalbumin), member 5 antibody
    • Serpin B5 antibody
    • serpin family B member 5 antibody
    • Serpin peptidase inhibitor antibody
    • Serpin peptidase inhibitor, clade B (ovalbumin), member 5 antibody
    • Serpinb5 antibody
    • SPB5_HUMAN antibody
    • Spi5 antibody
    • Spi7 antibody
    see all

Anti-MASPIN antibody images

  • Anti-MASPIN antibody (ab22354) at 1 µg/ml + Human prostate tumor tissue lysate (adenocarcinoma) - total protein (ab30305) at 20 µg

    Goat Anti-Rabbit IgG H&L (HRP) (ab97051) at 1/50000 dilution

    Performed under reducing conditions.

    Predicted band size : 42 kDa
    Observed band size : 42 kDa

    Exposure time : 2 minutes

    This blot was produced using a 4-12% Bis-tris gel under the MOPS buffer system. The gel was run at 200V for 50 minutes before being transferred onto a Nitrocellulose membrane at 30V for 70 minutes. The membrane was then blocked for an hour using 2% Bovine Serum Albumin before being incubated with ab22354 overnight at 4°C. Antibody binding was detected using an anti-rabbit antibody conjugated to HRP, and visualised using ECL development solution ab133406.

  • ab22354 staining MASPIN in human colon tissue by Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded tissue sections). The sections were fixed in paraformaldehyde and subjected to heat-mediated antigen retrieval in TRIS-EDTA Buffer pH 9.0 and permeabilized with a wash buffer with Tween. The primary antibody was diluted 1/2000 and incubated with the sample for 30 minutes at 20°C. An HRP-conjugated Goat anti-Rabbit polyclonal was used as the secondary antibody.

    See Abreview

  • All lanes : Anti-MASPIN antibody (ab22354) at 1 µg/ml

    Lane 1 : Human Prostate Tumor Tissue Lysate at 20 ug
    Lane 2 : Human Prostate Tumor Tissue Lysate at 20 ug with Human MASPIN peptide (ab24350) at 1 µg/ml

    Goat polyclonal to Rabbit IgG (Alexa Fluor® 680) at 1/10000 dilution

    Performed under reducing conditions.

    Predicted band size : 42 kDa
    Observed band size : 40 kDa (why is the actual band size different from the predicted?)
    Additional bands at : 30 kDa (possible cleavage fragment).ab22354 recognizes a band at approximately 40 kDa that corresponds in size to MASPIN (molecular weight of 42 kDa). This band is competed away by the addition of the immunizing peptide suggesting that the interaction is specific.

References for Anti-MASPIN antibody (ab22354)

This product has been referenced in:
  • Fristrup N  et al. Cathepsin E, maspin, Plk1, and survivin are promising prognostic protein markers for progression in non-muscle invasive bladder cancer. Am J Pathol 180:1824-34 (2012). IHC-P ; Human . Read more (PubMed: 22449953) »

See 1 Publication for this product

Product Wall

Abcam guarantees this product to work in the species/application used in this Abreview.
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections)
Human Tissue sections (Colon)
Antigen retrieval step
Heat mediated - Buffer/Enzyme Used: TRIS-EDTA Buffer pH 9,0
Yes - Wash-Buffer from Dako with Tween

Mr. Rudolf Jung

Verified customer

Submitted May 20 2011


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