• Product nameAnti-S100A9 antibody [2B10]
    See all S100A9 primary antibodies
  • Description
    Rat monoclonal [2B10] to S100A9
  • SpecificitySpecific for mouse S100-A9 protein that forms a heterodimer with S100-A8 and constitutes 45% of the neutrophil cytosolic protein. Stains neutrophils strongly and monocytes weakly.
  • Tested applicationsSuitable for: WB, IP, IHC-P, IHC-Fr, ICC/IFmore details
  • Species reactivity
    Reacts with: Mouse
  • Immunogen

    Recombinant full length protein, corresponding to amino acids 1-113 of Mouse S100A9

  • Positive control
    • Neutrophils FFPE mouse lung tissue sections RAW246.7 cell line
  • General notesGrowth Conditions: RPMI 2% + 10% FCS and weaned down to 5% FCS



Our Abpromise guarantee covers the use of ab105472 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
WB Use at an assay dependent dilution.
IP Use at an assay dependent dilution.
IHC-P Use a concentration of 10 µg/ml. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
IHC-Fr Use at an assay dependent dilution.
ICC/IF Use a concentration of 10 µg/ml.


  • FunctionCalcium-binding protein. Has antimicrobial activity towards bacteria and fungi. Important for resistance to invasion by pathogenic bacteria. Up-regulates transcription of genes that are under the control of NF-kappa-B. Plays a role in the development of endotoxic shock in response to bacterial lipopolysaccharide (LPS) (By similarity). Promotes tubulin polymerization when unphosphorylated. Promotes phagocyte migration and infiltration of granulocytes at sites of wounding. Plays a role as a pro-inflammatory mediator in acute and chronic inflammation and up-regulates the release of IL8 and cell-surface expression of ICAM1. Extracellular calprotectin binds to target cells and promotes apoptosis. Antimicrobial and proapoptotic activity is inhibited by zinc ions.
  • Tissue specificityExpressed by macrophages in acutely inflammed tissues and in chronic inflammation. Detected in peripheral blood leukocytes, in neutrophils and granulocytes. Detected at sites of vascular inflammation (at protein level). Also expressed in epithelial cells constitutively or induced during dermatoses.
  • Sequence similaritiesBelongs to the S-100 family.
    Contains 2 EF-hand domains.
  • Post-translational
    Phosphorylated. Phosphorylation inhibits activation of tubulin polymerization.
  • Cellular localizationSecreted. Cytoplasm. Cytoplasm > cytoskeleton. Cell membrane. Associates with tubulin filaments in activated monocytes. Targeted to the cell surface upon calcium influx. Released from blood leukocytes upon exposure to CSF2/GM-CSF, bacterial lipopolysaccharide (LPS) and during inflammatory processes. Serum levels are high in patients suffering from chronic inflammation.
  • Information by UniProt
  • Database links
  • Alternative names
    • Leukocyte L1 complex heavy chain antibody
    • 60B8AG antibody
    • CAGB antibody
    • Calgranulin B antibody
    • Calgranulin-B antibody
    • Calprotectin L1H subunit antibody
    • CFAG antibody
    • CGLB antibody
    • Cystic fibrosis antigen B antibody
    • L1AG antibody
    • Leukocyte L1 complex heavy chain antibody
    • LIAG antibody
    • MAC387 antibody
    • MIF antibody
    • Migration inhibitory factor related protein 14 antibody
    • Migration inhibitory factor-related protein 14 antibody
    • MRP 14 antibody
    • MRP-14 antibody
    • MRP14 antibody
    • Myeloid-related protein 14 antibody
    • NIF antibody
    • OTTHUMP00000015331 antibody
    • p14 antibody
    • Protein S100-A9 antibody
    • S100 A9 antibody
    • S100 calcium binding protein A9 antibody
    • S100 calcium binding protein A9 calgranulin B antibody
    • S100 calcium-binding protein A9 antibody
    • S100A9 antibody
    • S10A9_HUMAN antibody
    see all

Anti-S100A9 antibody [2B10] images

  • IHC image of S100A9 staining in mouse lung formalin fixed paraffin embedded tissue section, performed on a Leica BondTM system using the standard protocol B. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab105472, 10µg/ml, for 15 mins at room temperature. A goat anti-rat biotinylated secondary antibody was used to detect the primary, and visualized using an HRP conjugated ABC system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.

    For other IHC staining systems (automated and non-automated) customers should optimize variable parameters such as antigen retrieval conditions, primary antibody concentration and antibody incubation times.
  • ICC/IF image of ab105472 stained RAW246.7 cells. The cells were 100% methanol fixed (5 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab105472, 10µg/ml) overnight at +4°C. The secondary antibody (green) was ab98386, DyLight® 488 goat anti-rat IgG (H+L) used at a 1/250 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.

References for Anti-S100A9 antibody [2B10] (ab105472)

This product has been referenced in:
  • Bongers G  et al. Interplay of host microbiota, genetic perturbations, and inflammation promotes local development of intestinal neoplasms in mice. J Exp Med 211:457-72 (2014). Mouse . Read more (PubMed: 24590763) »
  • Yajima-Himuro S  et al. The junctional epithelium originates from the odontogenic epithelium of an erupted tooth. Sci Rep 4:4867 (2014). IHC-FoFr ; Mouse . Read more (PubMed: 24785116) »

See all 2 Publications for this product

Product Wall

I am happy to inform you that the predicted molecular mass of S100A9 is around 13 kDa. You can find the expected molecular mass and other valuable information about this protein on UniProt (http://www.uniprot.org/uniprot/P31725). Please note that S100A...

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