• Product nameAnti-Caldesmon antibody [EP789Y]
    See all Caldesmon primary antibodies
  • Description
    Rabbit monoclonal [EP789Y] to Caldesmon
  • Tested applicationsSuitable for: WB, IHC-P, ICC/IF, IPmore details
    Unsuitable for: Flow Cyt
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide corresponding to residues near the N-term of human Caldesmon.

  • Positive control
    • HeLa cell lysate, and human normal prostate tissue.
  • General notes

    Produced using Abcam’s RabMAb® technology. RabMAb® technology is covered by the following U.S. Patents, No. 5,675,063 and/or 7,429,487.

    Mouse, Rat: We have preliminary internal testing data to indicate this antibody may not react with these species. Please contact us for more information.



Our Abpromise guarantee covers the use of ab45691 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 1/1000. Detects a band of approximately 75 kDa (predicted molecular weight: 93 kDa).
IHC-P 1/250 - 1/500. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
ICC/IF 1/250 - 1/500.
IP 1/50.
  • Application notesIs unsuitable for Flow Cyt.
  • Target

    • FunctionActin- and myosin-binding protein implicated in the regulation of actomyosin interactions in smooth muscle and nonmuscle cells (could act as a bridge between myosin and actin filaments). Stimulates actin binding of tropomyosin which increases the stabilization of actin filament structure. In muscle tissues, inhibits the actomyosin ATPase by binding to F-actin. This inhibition is attenuated by calcium-calmodulin and is potentiated by tropomyosin. Interacts with actin, myosin, two molecules of tropomyosin and with calmodulin. Also play an essential role during cellular mitosis and receptor capping.
    • Tissue specificityHigh-molecular-weight caldesmon (isoform 1) is predominantly expressed in smooth muscles, whereas low-molecular-weight caldesmon (isoforms 2, 3, 4 and 5) are widely distributed in non-muscle tissues and cells. Not expressed in skeletal muscle or heart.
    • Sequence similaritiesBelongs to the caldesmon family.
    • DomainThe N-terminal part seems to be a myosin/calmodulin-binding domain, and the C-terminal a tropomyosin/actin/calmodulin-binding domain. These two domains are separated by a central helical region in the smooth-muscle form.
    • Post-translational
      In non-muscle cells, phosphorylation by CDK1 during mitosis causes caldesmon to dissociate from microfilaments. Phosphorylation reduces caldesmon binding to actin, myosin, and calmodulin as well as its inhibition of actomyosin ATPase activity. Phosphorylation also occurs in both quiescent and dividing smooth muscle cells with similar effects on the interaction with actin and calmodulin and on microfilaments reorganization.
    • Cellular localizationCytoplasm > cytoskeleton. Cytoplasm > myofibril. On thin filaments in smooth muscle and on stress fibers in fibroblasts (nonmuscle).
    • Information by UniProt
    • Database links
    • Alternative names
      • CAD antibody
      • CALD 1 antibody
      • CALD1 antibody
      • CALD1_HUMAN antibody
      • Caldesmon 1 antibody
      • Caldesmon 1 Isoform 1 antibody
      • Caldesmon 1 Isoform 2 antibody
      • Caldesmon 1 Isoform 3 antibody
      • Caldesmon 1 Isoform 4 antibody
      • Caldesmon 1 Isoform 5 antibody
      • Caldesmon antibody
      • Caldesmon1 antibody
      • CDM antibody
      • H CAD antibody
      • HCAD antibody
      • L CAD antibody
      • LCAD antibody
      • MGC21352 antibody
      • NAG22 antibody
      see all

    Anti-Caldesmon antibody [EP789Y] images

    • Ab45691 (1:250) staining human Caldesmon in human normal prostate tissue by immunohistochemistry using paraffin embedded tissue.
    • Immunofluorescent staining of HeLa cells using ab45691 (1:250).
    • Anti-Caldesmon antibody [EP789Y] (ab45691) at 1/10000 dilution + HeLa cell lysate (10ug/lane)

      Goat anti-rabbit HRP labeled at 1/2000 dilution

      Predicted band size : 93 kDa
      Observed band size : 75 kDa (why is the actual band size different from the predicted?)

    References for Anti-Caldesmon antibody [EP789Y] (ab45691)

    This product has been referenced in:
    • Pieretti AC  et al. A novel in vitro model to study alveologenesis. Am J Respir Cell Mol Biol 50:459-69 (2014). IHC-P . Read more (PubMed: 24066869) »
    • Sun Q  et al. Role of myocyte enhancing factor 2B in epithelial myofibroblast transition of human gingival keratinocytes. Exp Biol Med (Maywood) 237:178-85 (2012). Read more (PubMed: 22302709) »

    See all 2 Publications for this product

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